—VIETNAM • 3 males (including holotype), 1 female, 5 female nymphs; ZIN [not examined]

—VIETNAM • 2 females, 6 males; Prov. Vinhfu, Tam Dao N.P. [= National Park]; 21°31’N, 105°33’E, 25–30 Jul. 2011; J. Constant and J. Bresseel leg.; I.G. 31.933; ISNB.

—(2 males, 1 female; in mm) Body w/o wings: male 10.5–11.7, female 13.2; pronotum: male 3.9–4.0, female 4; tegmen: male 1.6–1.9, female 0; hind femur: male 11.0–11.5, female 13.4; ovipositor: female 8.6.

—This species has been described in detail by Gorochov (1996). It was named for the azure coloration of the alive male mixed with a black pattern. That azure color appears ivory white in museum specimens, while the legs are mostly green. I use this opportunity to illustrate the change of coloration between an alive male and a museum specimen (Fig. 2A, B). The females do not show the same striking coloration but display various shades of brown with black marks. A female from Tam Dao has fore- and mid-legs with remnants of green. Thus, one may suppose that at least some females of this species have green legs when alive.

—The female specimens from the type locality were clued to cardboard. Thus, a female from Ba Vi, Hanoi, Vietnam, was used to document the subgenital plate, although no male from that locality was available to verify the identification.

Figure 2. 

Lipotactes males: A–C. L. azureus Gorochov, 1996; D–G. L. serratus sp. nov.; H–I. L. vietnamicus Gorochov, 1993. A. Alive male in habitat (photo credit Jérôme Constant); B, D. Male dorsal view; C, E, H. Abdominal apex in apical view; G, I. In dorsal view; F. Tip of cercus greatly enlarged (also insets in C and I). Abbreviations: d, dorso-medial projection of cercus; p, paired phallus sclerites; u, unpaired phallus sclerite. The white arrow in C indicates the spine at base of the upper process. Scales for habitus: 10 mm; for cerci: 1 mm.

Figure 3. 

Lipotactes females: A–F. L. serratus sp. nov.; G–I. L. vietnamicus Gorochov, 1993 from Cuc Phuong; J, K. L. cf. azureus Gorochov, 1996 from BaVi; L. L. azureus Gorochov, 1996 from Tam Dao. A. Habitus dorsal view; B, C, G. Face; D, J. Subgenital plate; E, H, L. ovipositor; F, I, K. End of ovipositor with serrate ventral margin. Scales for habitus and face: 5 mm; others: 1 mm.

—Vietnam, Prov. Hasonbinh, Cuc Phuong Nature Reserve.

—VIETNAM • 1 male (holotype), 2 females (paratypes); ZIN [not examined]

—VIETNAM • 1 female, 1 male; Hoa Binh Prov., Cuc Phuong N.P. [= National Park]; 20°19’N, 105°36'30"E; 19–23 Jul. 2011, J. Constant and J. Bresseel leg.; I.G. 31.933; ISNB.

—(1 male, 1 female; in mm) Body w/o wings: male 13.5, female 15; pronotum: male 4.2, female 4.7; tegmen: male 3, female 0; hind femur: male 13, female 14.5; anterior femur: male 4, female 4; ovipositor: female 8.

—This species was described in detail by Gorochov (1996) and was also reported from China by Feng et al. (2017). Some images are given for comparison with the new species described below.

—Holotype: VIETNAM • male; Tay Yen Tu Nat. Res. [= Nature Reserve]; 21°11'10"N, 106°43'25"E; 7–11 Jul. 2013; J. Constant and J. Bresseel leg.; I.G. 32.454;ISNB. Paratypes: VIETNAM • 6 females, 1 male; same data as for holotype; ISNB.

—In general appearance and coloration of males, the new species strongly resembles L. azureus Gorochov, 1996, although there are differences in details: the male pronotum is slightly prolonged and elevated posteriorly, almost completely covering the tegmen in dorsal view instead of leaving the apical area free, and the black band along the apical margin of the pronotum is broader than in L. azureus; in females, the black lateral bands of the pronotum are less distinct and gradually pass over into the brighter surrounding area, and the ovipositor is not as stout and less strongly curved as in L. azureus. The male cercus resembles that of L. proximus Gorochov, 1996, although the dorsal internal process has the internal margin straight, not concavely incised, and the process in apical view is more strongly upcurved; the ventral internal process has the dorsal surface concave as in L. azureus but is distinctly longer and resembles that of L. orlovi Gorochov, 1996, L. proximus, and L. vietnamicus Gorochov, 1993. The narrow apical area of the male cercus resembles, by its more pronounced bend, that of L. orlovi or L. vietnamicus. From all four mentioned species, it differs by the tip of the narrow apical area of the male cercus that is not acute nor slightly spinose but terminates into a serrate apical cone. The male phallus is provided with a parallel running pair of elongate granular sclerites that are triangularly widening at base; the apical areas of these sclerites are strictly parallel, neither deviating and narrowing as in L. vietnamicus, nor widened as in L. orlovi, nor curved outwards as in L. azureus or setose at tip as in L. proximus; the tips of these sclerites are acute rather than obtuse as in the other four species; the unpaired medial sclerite hardly reaches the end of the triangular widening of the elongate sclerites.

—Medium-sized species. Males with white bodies and green legs, both with black ornaments (Fig. 2D); females brown with black ornaments (Fig. 3A).

Male. Pronotum with two transverse furrows, posterior area prolonged and almost fully covering tegmen. Tenth abdominal tergite at hind margin with a rather deep concave incision in middle. Epiproct with deep medial furrow. Cercus with stout basal area wider than long, at external angle prolonged into a narrow and little curved process that terminates into a strong spine that carries along margins acute teeth (Fig. 2F); at the internal apical angle of the wide basal area, prolonged into a dorsal and a ventral process; the dorsal process wide, compressed, and slightly upcurved with subtruncate apical margin and rounded distal but subangular proximal angle. The distal margin of the process is curved ventrad to meet the ventral process at base but narrows towards tip; the ventral process roughly elongate, triangular with rounded tip and concave dorsal surface, also somewhat upcurved (Fig. 2E, G). Phallus with two paired and one unpaired sclerites; paired sclerites triangular at base and prolonged into long, nearly straight, and parallel apical extensions with finely granular surface and only slightly narrowing towards obtuse tip; unpaired sclerite short with obtuse tip, not surpassing the triangular basal area of the lateral sclerites (Fig. 2E). Subgenital plate with roundly approaching lateral margins; apical margin sub-angularly incised; styli long and narrow (Fig. 2G).

Coloration. Face and vertex white with a medium to light brown medial band from end of vertex to clypeus and with a pair of slightly darker, medium brown subocular bands continued on mandibles; clypeus light green with brown rim; vertex with a wide black transverse band between compound eyes. Antennae annulated. Pronotum white with brown rim; in anterior area, with a pair of roughly rectangular black spots with projecting posterior angles and a triangular white spot; along hind margin and including part of paranota, with a wide black band that narrows from middle to lateral areas. Tegmen green. Abdominal tergites white; tergites 2–7 and 10 with black lateral bands. Cerci light brown with dark dots, internal processes getting darker towards tips. Subgenital plate in dorsal view white; styli brown. Legs green with numerous black dots at femora and tibiae; hind femur in widened basal area with a black oblique band followed by a black ring at beginning of narrow apical area; also black around hind knee on femur and tibia.

Female. Subgenital plate with strongly convex lateral margins; more or less membranous and slightly projecting at subtruncate apical margin, with faint medial furrow (Fig. 3D). Ovipositor elongate, upcurved, regularly narrowed towards acute tip; ventral margin very finely serrulate before end (Fig. 3E, F).

Coloration. Face light or dark reddish brown, mouthparts of lighter color; vertex with complete or incomplete black transverse band between compound eyes (Fig. 3B, C). Antennae annulated. Pronotum brown with incomplete black lateral bands; transverse furrows very weak, but both furrows with a pair of short but deep impressions. Abdomen brown; segments 1–7 with black lateral bands. Legs as in male but of brown foundational color. Ovipositor medium brown.

—(2 males, 6 females; in mm) Body w/o wings: male 10.0–10.5, female 11.5–15.0; pronotum: male 4.0–4.2, female 3.2–4.2; tegmen: male 2, female 0; hind femur: male 11–12, female 12–14; anterior femur: male 3.5–4.0, female 3.7–5.0; antenna: female 70; ovipositor: female 7.0–9.5.

—The name of the new species refers to the apical spine of the male cercus that carries acute teeth along margins; from Latin serrare meaning “to saw”.

—VIETNAM • 2 females; Cat Ba N.P. [= National Park]; 20°48’N, 107°0'20"E; 12–16 Jul. 2013; J. Constant and J. Bresseel leg.; I.G. 32.454;ISNB. 1 female; ChamChu N. R. [= Nature Reserve]; 22°12’N, 105°6'0"E; 8–12 Jul. 2015, J. Constant and J. Bresseel leg.; I.G.: 33.092; – ISNB. 1 female, 1 nymph male; Hanoi prov., BaVi N.P.; 21°4'4"N, 105°21'30"E; 25–29 Jun. 2015; J. Constant and J. Bresseel leg.; I.G.: 33.092; ISNB.

—Five species related to and including L. azureus were differentiated by Gorochov (1996), of which one species, L. sinicus (Bey-Bienko, 1959), is from China, and four species are from North Vietnam. These species were all based on the characteristic shapes of the male cerci and sclerites found on the male phallus. Both characters follow a common basic structure, which is markedly modified between species. For two of these five species, the females are still unknown. In the current paper, another species of this group from Northern Vietnam is described. Although females of these species can be differentiated as a group from other Vietnamese Lipotactes species by the absence of a weak concavity at the end of the dorsal margin of the ovipositor, no characters are reported so far to differentiate between the females of these species.

In the collection of specimens studied for this publication, there were four females and one nymph without corresponding adult males from three localities that are not one of the type localities of the described species. These specimens do not show any conspicuous diagnostic difference from the female of L. azureus, although they are missing the green color of the legs. I abstain from arranging these females to any of the named species.

—Holotype: VIETNAM • male; Central Vietnam, Bach Ma N.P. [= National Park]; 16°12’N, 107°52’E; 15–16 Jul. 2011; J. Constant and J. Bresseel leg.; I.G. 31.933; ISNB. Paratypes: VIETNAM • 3 males; same data as for holotype; ISNB.

—A predominantly green species that does not seem to be close to any other Lipotactes species reported so far from Vietnam. It is missing the striking black and pale color pattern and the complex internal process of the cercus found in the species reported from the more northern areas of Vietnam (e.g., L. azureus Gorochov, 1996 or L. vietnamicus Gorochov, 1993), but it also does not show the dull color pattern of species found in South Vietnam and Cambodia (e.g., L. ingrischi Gorochov, 1996), although it shares with both groups of species the possession of a narrow apical area of the male cercus that differs in shape from that of the other species. From coloration, the new species resembles L. virescens Ingrisch, 1995. It differs by the shape of the male cercus, which has a strongly widened base, incurved and narrow apical area, and a long and angularly curved internal process instead of a short and narrow internal process with a tubercle at base. Regarding the internal process of the male cercus, the new species resembles L. hamatus (Karny, 1931) described from Sulawesi. It differs by the strongly widened cercus base, the curved tip of the cercus, the larger and more strongly bent internal process, by the posteriorly widened and elevated disc of the pronotum, and by the strongly inflated tegmina.

—Medium-sized species of predominantly green coloration with dark pattern (Figs 4A–B).

Male. Pronotum prolonged with diverging lateral margins to behind mid length, inflated in posterior half; anterior margin bend-up and rounded, appearing in dorsal view concave, posterior margin widely rounded; first transverse sulcus distinct and entire; second and third transverse sulcus hardly distinct except second sulcus on paranota. Tegmen strongly inflated (Fig. 4D). Tenth abdominal tergite in dorsal area somewhat prolonged, but apical margin widely concave in middle (Fig. 4F). Epiproct large with a deep medial furrow. Cerci rather short, extremely widened at base and, there, almost as wide as long; internal margin strongly narrowed towards narrow tip of cercus; tip slightly curved mediad; from ventral side of base of cercus with a compressed elongate internal process that is rather narrow and bent before mid-length in an almost 90°-angle mediad and slightly narrowed towards tip (Fig. 4E–G). The processes from both cerci almost touching each other in the middle. Subgenital plate wider than long with concave basal and convex lateral margins; apical margin subtruncate, very faintly concave between bases of styli; ventral surface convexly swollen in basal half, followed by a narrow conical swelling in middle (Fig. 4H).

Coloration. Head green; vertex with a pair of black bands that fuse to a single band at median ocellus and with a pair of short black lines from behind compound eyes to occiput. Frons green with three black vertical bands: two lateral bands from below compound eyes to tip of mandibles and one medial band from median ocellus to tip of labrum (Fig. 4C). Antennae with flagellum black with sparse white spots. Pronotum green with posterior area, anterior and posterior margins reddish brown, which may be partly due to discoloration in the set specimen. Tegmen brownish transparent; margin green. Abdomen discolored. Legs green, consperse with black dots; hind femur with apical area black and with a black stroke in pre-apical area restricted to dorsal margin. Male cerci of general color but internal–ventral surface and internal process black; male subgenital plate of light color; styli darkened.

Female. Unknown.

—(4 males; in mm) Body w/o wings: male 14–16; pronotum: male 6.2–6.8; tegmen: male 5.0–5.3; hind femur: male 11.8–12.5; anterior femur: male 4–5; antenna: male 60–65.

—The name of the new species refers to the angular internal tooth of the male cercus; from Latin angularis: angular.

Figure 4. 

Lipotactes angulatus sp. nov. males. A. Habitus dorsal view; B. Habitus lateral view; C. Frons; D. Anterior area of body with oblique apical view on tegmen; E–G. Abdominal apex in apical view (E) and in dorsal view of different males (F, G); H. Subgenital plate and cerci in ventral view. Scales for habitus (A–B): 5 mm; others (C–H): 1 mm.

—Holotype: VIETNAM • male; South Vietnam, Cat Tien NP [= National Park]; 11°26’N, 107°26’E; 6–16 Jul. 2012; J. Constant and J. Bresseel leg.; I.G.: 32.161; ISNB. Paratypes: VIETNAM • 1 female, 2 males; South Vietnam, Dong Nai Biosphere Res.; 11°18’N, 107°6’E; 25 Jun.–6 Jul. 2012; J. Constant and J. Bresseel leg.; I.G.: 32.161; ISNB.

—The new species is very similar to L. sulcatus Ingrisch, 1995 and L. ingrischi Gorochov, 1996 in general appearance, size, and coloration. It differs from both by the shape of the male cerci that are conical with a vertically oriented, rounded process in basal area and terminating into a rather long styliform apical area that is pointing straight behind, while in L. sulcatus, the cercus is rather narrow at base then widens to a process before mid-length and the styliform apical area appears attached and is pointing apico-lateral. In L. ingrischi, the male cercus has a short stout basal area with a horizontally oriented internal process that is distinctly wider at tip than at base, and the styliform apical area is pointing strongly laterad. More closely related to L. productus sp. nov. is L. discus sp. nov., described below. Both species have a vertically oriented, rounded process in the basal area of the male cercus to which, on the ventral side, a styliform process is appended. They differ in that the rounded internal process is somewhat spherical in L. productus with the styliform process flattened and arising from the proximo-ventral angle, while in L. discus the process is conical and the styliform process arises from the ventro-distal angle. In addition, the narrow apical area of the cercus is pointing straight behind in L. productus while oblique outwards in L. discus. Moreover, the tenth abdominal tergite has the apical margin slightly bilobate in the former while slightly concave in the latter species.

—Small sized species of yellowish to grayish brown coloration with dark pattern.

Male. Pronotum convexly raised in posterior area. Tenth abdominal tergite slightly bilobate in middle. Cerci narrow conical with a long and narrow cylindrical apical area (Fig. 6H). In subbasal area of cercus, with a roughly circular internal process with strongly convex posterior surface and delimited from cercus stem by a weak furrow; at ventral side, a short, compressed, obtuse extension arises from the base of the process (Fig. 6F–G). Subgenital plate with strongly convex underside and with convex lateral margins that are at tip prolonged posteriorly into short, compressed, apical lobes that are separated by a wide concavity from each other and carry on the underside rather long styli (Fig. 6G).

Female. Subgenital plate wider than long, slightly curved from one side to the other; apical margin faintly concave (specimen glued on cardboard with subgenital plate only visible from behind). Ovipositor with ventral valves only faintly upcurved in about apical half, more strongly upcurved towards tip; ventral margin in apical area provided with a few minute teeth: ten teeth in the specimen at hand; dorsal valves at base slightly depressed, then with dorsal margin nearly straight to almost mid-length; in subapical area, distinctly concave, then widened and convex, and in apical area, concave again to tip (Fig. 5C inset).

Coloration (both sexes). Grayish to ochre brown with black marks. Frons yellowish brown or ochre with little irregular, rather narrow, dark vertical bands. Vertex with two narrow black bands along midline and irregular black spots behind eyes. Pronotum with black bands along lateral angles that do not reach the hind margin. Abdominal tergites with transverse black spots along midline to last tergite and with black lateral bands to about mid-length of abdomen. Legs with numerous dark brown to black dots. Hind femur with an upcurved black band from base and with black hind knees, the latter prolonged anteriorly into a medium to dark brown spot and another but rather indistinct dark brown spot at the beginning of the narrow apical area.

—(3 males, 1 female; in mm) Body w/o wings: male 11.5–12.0, female 11.0; pronotum: male 4.3–4.7, female 3.5; tegmen: male 2.5–3.3, female 0; hind femur: male 12.0–13.5, female 12.0; antenna: male 60; ovipositor: female 5.5.

—The name of the new species refers to the prolonged narrow apical area of the male cercus; from Latin productus: prolonged, produced, elongated.

Figure 5. 

Lipotactes sp. A, B, D. L. productus sp. nov. male; C. Female; E–G. L. discus sp. nov. male; H–J. L. samkos sp. nov. male. A, F, H. Habitus lateral view; B, C, G, I. Habitus dorsal view; D, E, J. Face. Inset in C. Apical half of ovipositor in lateral view. Scales for habitus: 10 mm; for face and ovipositor: 1 mm.

Figure 6. 

Lipotactes sp. A, B. L. discus sp. nov.; C–E. L. samkos sp. nov.; F–H. L. productus sp. nov. A, G. Male abdominal apex with cerci in apical view; B. Oblique dorsal view; C. Dorsal view in situ; E, F. Dorsal view with cerci spread sideward; D. Oblique ventral view; H. Left cercus in dorsal view. Arrows point at ventral extension of internal process of the male cercus. Abbreviations: 10, tenth abdominal tergite; ce, cercus; e, epiproct; pa, paraproct; ph, phallus; sg, subgenital plate; st, stylus. All scales 1 mm.

—Holotype: CAMBODIA • male; Ratanakiri, Yeak Laom Lake env. [= environment]; 13°44’N, 107°1’E; 9–11 Oct. 2017; J. Constant and X. Vermeersch leg.; I.G. 33.551; ISNB.

—In general appearance and shape of the male cerci, the new species is similar to L. productus sp. nov. It differs by the male cercus that has a more strongly conical basal area and the narrow apical area shorter and pointing outwards instead of straight behind, also by the internal process of the cercus that stands vertically to the cercus axis and is roughly disc-shaped in both species but has a conical tooth arising from the ventro-distal angle in L. discus sp. nov. while slightly shorter and arising from the proximo-ventral angle of the process in L. productus sp. nov. Moreover, the apical margin of the tenth abdominal tergite is slightly bilobate in L. productus sp. nov. but simply concave in L. discus sp. nov. From L. khmericus Gorochov, 1998 that lives in the same larger area, the new species differs strikingly by the shape of the internal process of the male cercus that is vertically inserted in L. discus sp. nov. while horizontally inserted and terminating into three short lobes of different shapes in L. khmericus. Moreover, in the new species, the narrow apical area of the cercus is relatively shorter (about 0.65 times the length of the basal area) and gradually narrows from the wider and conical basal area, while in L. khmericus, it is relatively longer (about 0.85 times) and abruptly narrows from the basal area.

—Small sized species of yellowish to grayish brown coloration with dark pattern.

Male. Pronotum with apical area prolonged and slightly elevated, with three transverse furrows; the first furrow distinct on disc and on paranota, the second furrow restricted to paranota, and the third furrow weak on disc, distinct on paranota (Fig. 5F, G). Cerci conical with little out-curved narrow apical area with subacute tip; cercus trunk in subbasal area with a vertical, compressed circular process that is prolonged in a ventro-distal angle into a cone; margin of process and cone finely granular; disc in upper basal area slightly swollen on distal side (Fig. 6A, B). Subgenital plate with lateral margins convex, in apical area straight; apical margin roundly excised; long styli inserted on underside at lateral tips of subgenital plate.

Coloration. Grayish to ochre brown with black marks. Frons yellowish brown to ochre with indistinctly delimited lighter and darker areas; clypeus and labrum of lighter color, mandibles yellowish white, darkened towards tip, with a rounded black spot in subbasal area. Vertex with six short longitudinal black bands from hind margin. Pronotum with black bands along lateral angles reaching the hind margin. Abdominal tergites brown with black lateral bands. Legs yellowish brown with numerous dark brown to black dots. Hind femur with an upcurved black band from base and with black apical area that is preceded by a pale ring and by a black stroke restricted to dorsal margin.

Female. Unknown.

—(1 male; in mm) Body w/o wings: 9; pronotum: 3.5; tegmen: 2.5; hind femur: 10; anterior femur: 2.8.

—The name of the new species refers to the basic shape of the internal process of the male cercus, from Latin discus, noun in apposition.

—Holotype: CAMBODIA • male; Pursat, Phnom Samkos; 12°13'2"N, 102°55'7"E; 15–18 Oct. 2016; J. Constant and J. Bresseel leg.; I.G.: 33.345 GTI project; ISNB.

—The basic shape of the internal process of the male cercus of the new species is similar to that in L. khmericus Gorochov, 1998, as it is oriented horizontally and has the proximal marginal area down-bent. However, in L. samkos sp. nov., the internal margin is slightly wavy, while in L. khmericus, it has a distinct rounded incision; as a result, the straight posterior margin of the process appears as such in the new species, while it is part of the internal margin in L. khmericus. Additionally, a narrow ventral spine of the internal process arises from the underside of the process while from the ventro-internal margin in L. khmericus. The apical area of the cercus stem is slightly conical, distinctly bent outward, and with an obtuse tip in the new species, while that area is suddenly narrowed at base and subcylindrical with an acute spinose tip in L. khmericus. From L. saengeri sp. nov., the new species differs by the shape of the internal process of the male cercus, the shape and inserting position of a small ventro-medial spine at the internal margin of the process, and by the conical instead of cylindrical and more strongly outwards bent apical area of the cercus. L. ingrischi Gorochov, 1996 also has a horizontal internal process of the male cercus, but the new species differs by the shape of the internal process and by the narrow apical part of the cercus that is much less curved laterad instead of strongly curved laterad.

—Small sized species of yellowish to grayish brown coloration with dark pattern.

Male. Pronotum with three faint transverse furrows indistinct or absent on disc; apical area prolonged and slightly elevated (Fig. 5H, I). Tenth abdominal tergite short, apical margin very faintly concave in middle. Epiproct elongate-triangular, apex obtuse and slightly curved posteriorly. Paraproctes spoon-shaped with short stem and large bowl-shaped processes below internal processes of cerci. Cerci conical with slightly out-curved narrow apical area with subacute tip; cercus trunk in subbasal area provided with a horizontal internal process with rather long and flat proximal area that in dorsal view is strongly widening towards both sides into a rounded proximal lobe and a strongly swollen, subtruncate, or little convex distal lobe (Fig. 6E). In dorsal view and when at rest, the sub-straight internal margins of the processes of both cerci touching each other in the middle but deviating distally (Fig. 6C). On ventral side of the process, the anterior margin terminates into a conus; moreover, there is another short, but somewhat compressed conus from below the internal margin of the process (Fig. 6D). Phallus membranous. Subgenital plate slightly wider than long with marked disc and up-bent lateral margins; apical margin wide and shallowly concave; styli inserted on underside at lateral angles of disc of subgenital plate (Fig. 6C).

Coloration. Yellowish to reddish brown with black pattern. Face with mixed flecks of yellowish and blackish brown; clypeus and mouthparts yellowish with brown flecks; vertex with six longitudinal dark brown bands. Pronotum with black band in upper area of paranota followed downwards by whitish, blackish, and again whitish bands; disc yellowish with darker staining in anterior half, red brown in posterior half. Tergites mostly black with few lighter spots, last three abdominal tergites and cerci mostly yellowish brown; subgenital plate medium brown. Legs yellowish brown with numerous rather large black dots; hind femur in about basal third with a wide black band that is bent to dorsal margin at end, narrow apical area with dorsal margin little darkened, followed by a long whitish ring and then shining black to tip; hind tibia rather pale with indistinct darker flecks, only apical area and lateral margin of tarsal segments partly black.

Female. Unknown.

—(1 male; in mm) Body w/o wings: 11; pronotum: 4.2; tegmen: 2; hind femur: 11; anterior femur: 3.

—Holotype: THAILAND • male; Chanthaburi, Khao Sabap; 12°32'58.13"N, 102°11'55.32"E; 9 Sep. 2008; B. Helfert and K. Sänger leg.; NMW. Paratype: THAILAND • 1 male; same data as for holotype; NMW. Other material: THAILAND • 1 female; same data as for holotype; not re-examined; NMW.

—The new species is similar to L. khmericus Gorochov, 1998 and L. samkos sp. nov. It differs from both by the shape of the internal process of the male cercus that has the anterior area flat and extended anteriorly, not down-bent as in both other species, but the central area of that process is slightly swollen instead of flat. The small ventral thorn of the process has an acute instead of obtuse tip and inserts nearly in the middle of the internal ventral margin instead of closer to the anterior margin in both other species; the internal margin of the process is slightly three-lobular instead of distinctly lobular in L. khmericus or sub-straight in L. samkos. The narrow apical area of the male cercus is cylindrical and moderately out-curved in L. saengeri sp. nov., conical and more strongly out-curved in L. samkos, while only faintly out-curved but suddenly narrowed at base and provided with an apical spine in L. khmericus.

—Small sized species of yellowish to grayish brown coloration with dark pattern.

Male. Tenth abdominal tergite short, apical margin in central area slightly concave in strict dorsal view. Epiproct triangular with blunt tip and medial furrow. Cercus in more than basal half conical, following apical area slightly out-bent and sub-cylindrical with blunt tip; in basal area with a large, dorso-ventrally compressed, internal process that is behind basal incision widening slightly to three-lobate internal margin: basal lobe rounded, flat, medial lobe with slightly convex dorsal surface and also with rounded tip from which the ventro-internal margin gives rise to an acute, conical spine with granular surface and pointing medio-ventrad; apical lobe of rectangular appearance with rounded angles, separated by only a shallow incision from medial lobe (Fig. 7A, B). Subgenital plate with shallowly concave apical margin; styli inserted at both sides of concavity.

Female. Described and figured in detail by Helfert and Sänger (2009) as L. khmericus. Subgenital plate with a simple, roughly oval outline without modification.

Coloration (both sexes). Museum specimens formerly conserved in alcohol; grayish pale to light ochre brown with dark blackish brown marks. Frons with indistinctly delimited lighter and darker areas; clypeus and labrum of lighter color, mandibles light gray, darkening towards tip. Pronotum with brownish disc and with black bands along lateral angles reaching the hind margin or the second transverse sulcus. Abdominal tergites light brown with black lateral bands. Legs light brownish with numerous dark brown to black dots. Hind femur on external side in more than basal quarter almost white with a blackish band in middle that is upcurved at end, afterwards with numerous large black dots; hind knees blackish brown. Hind tibiae at base and end also darkened. Photos of alive male and female are figured in Helfert and Sänger (2009).

—(2 males; in mm) Body w/o wings: 12.7–13.1; pronotum: 4.5–4.6; tegmen: 2.3–2.4; hind femur: 10.9–11.8.

—The new species is named after one of the collectors, Dr. Karl Peter Sänger (1939–2019), well known for his work on the ecology of European Orthoptera who, in his later years, became interested in the tropical fauna (see Waitzbauer 2019).

Figure 7. 

Lipotactes sp. A–B. L. saengeri sp. nov.; C. L. samkos sp. nov.; D. L. khmericus Gorochov, 1998; E. L. minutus Ingrisch, 1995; F. L. silvestris Ingrisch, 1990; G. L. montanus Ingrisch, 1990; H. L. sulcatus Ingrisch, 1995; I. L. ingrischi Gorochov, 1996; J. L. virescens Ingrisch, 1995. A. Abdominal apex with cerci in dorsal view; B. Cercus in oblique dorsal view from behind; C–J. Cercus in dorsal view. Photos A–B from NMW NOaS Image Collection, photo credit H. Bruckner; figures D and I redrawn from Gorochov (1996 and 1998); figures E and H from Ingrisch (1995). All scales 1 mm; line drawings D and H–I not to scale.

—CAMBODIA • 1 female; Siem Reap, Preak Toal; 13°14'32"N, 103°39'5"E; 6–14 Aug. 2005; Danny Jump leg.; ISNB.

—Including the two new species described in this paper, three Lipotactes species are so far known from Cambodia based on marked differences of the male cerci, which is thought to be of isolating value between the species. Unfortunately, none of the females of these species have been collected at the type localities; thus, it is not possible to assign single females collected at other localities of the country to one of these species.

The type localities of both L. khmericus Gorochov, 1998 and L. discus sp. nov. lie in the Ratanakiri province of Cambodia. Both species were identified based on the male abdominalia. The female from Preak Toal has a subgenital plate with widened base and semi-oval widening of central area resembling the shape in L. silvestris Ingrisch, 1990 from Khao Soi Dao in Southeastern Thailand, differing by the circular apical depression of the subgenital plate and the incised hind margin. The female from Preak Toal also differs clearly from the female described in Helfert and Sänger (2009) that has a simple semi-oval shaped subgenital plate with apical margin convex without groove or basal widening. The closest locality from which a male of Lipotactes has been reported is that of L. samkos sp. nov., which is over 300 km away from Preak Toal. It is uncertain if the female belongs to that species, although it cannot be excluded. Thus, it is best to avoid naming the female until more material from the area becomes available.

—Small sized species of yellowish to grayish brown coloration with dark pattern.

Female. Subgenital plate wider than long; lateral areas very short; central area swollen and roundly projecting behind narrow lateral areas; the projecting part with a deep membranous groove in middle, at apex concave; laterally of the groove, the surface is swollen on both sides (Fig. 8C). Ovipositor slightly curved; dorsal margin in middle concave, then slightly convex and only very faintly concave before acute tip; ventral margin behind sub-straight basal area concave to acute tip, in apical area provided with about six tiny teeth (Fig. 8D, E).

Coloration. Frons with irregular brownish–yellowish pattern; labrum and mandibles of lighter color; vertex with six slightly expressed dark longitudinal bands from hind margin (Fig. 8B). Pronotum with black bands along lateral angles that almost but not completely reach the hind margin. Abdominal tergites brown with black lateral bands. Legs yellowish brown with numerous dark brown to black dots. Hind femur with a black band from base that has the upcurved part largely reduced; the black apical spot becomes brownish anteriorly and the pre-apical dark spot is only indicated (Fig. 8A).

—(1 female; in mm) Body w/o wings: 10.5; pronotum: 4; tegmen: 0; hind femur: 11; anterior femur: 2.8; ovipositor: 7.5.

Figure 8. 

Lipotactes sp. female from Preak Toal, Cambodia: A. Habitus, lateral view; B. Face; C. Subgenital plate and base of ovipositor in ventral view; D. Ovipositor in lateral view; E. End of ovipositor in greater magnification. Scales 10 mm (A), 1 mm (B–E).