Tribe Gymnobothrini. Figs 166–180. Gymnobothrus lineaalba: 166A. Orthochirista variegata Sjöstedt (n. syn. of Gymnobothrus lineaalba), reproduced from Sjostedt (1931). 166. Oblique view head and pronotum; 167. Frontal ridge; 168–174. Variation in pronotal disc; 175. Oblique view vertex; 176. Dorsal view vertex; 177, 178. Variation in phallic structures; 179. Female spermatheca; 180. Female subgenital plate A. Dorsally and its apex B. Ventrally and C. Laterally. Figs 181, 182. Gymnobothrus carinatus: 181. Male pronotal disc; 182. Epiphallus and aedeagal valves. Scale lines all represent 1 mm: bottom left scale under Fig. 182 applies to Figs 175–179, 182; scale under Fig. 172 applies to all the rest.