Figs 1–4. Female spermathecal ducts. 1, 2. In Orthochtha-Euprepoptera-Lobopoma genus group (after Popov and Fishpool 1992): 1. Spermathecal duct in situ in relation to ovipositor valves; 2. Spermathecal duct isolated (s, sd, PL); 3. As Fig. 2, but in Duronia genus group. 4. Female genital ducts of the Oedipodinae, represented by Aiolopus thalassinus thalassinus (Fabr.) (after Hollis 1968). Abbreviations applying to Figs 1–4: PL – proximal loop of spermathecal duct, characteristic of most Acridinae, to contrast with its absence in Fig. 4, which is characteristic of Oedipodinae; Sd – spermathecal duct; Sa – spermathecal aperture; S – spermatheca; Ad, Pd – apical and preapical diverticula of spermatheca. Figs 5–39. Male epiphalli representing tribes and genus-groups of the Acridinae s. str. (after Dirsh 1956). Figs 5–7. Tribe Truxalini: 5. Truxalis nasutus (L.,1758); 6. Chromotruxalis cockerelli (Uvarov, 1932); 7. Truxaloides serratus (Thunberg, 1815). Fig. 8. Tribe Acridini: Acrida turrita (L.,1758). Figs 9–23. Tribe Phlaeobini: Figs 9–12. Orthochtha-Euprepoptera-Lobopoma genus group: 9. O. venosa (Ramme, 1929); 10. O. g. dasycnemis (Gerstaecker, 1869); 11. Euprepoptera polychroma Uvarov, 1953; 12. Lobopoma ambages Karsch, 1896. Figs 13–15. Cannula-Glyphoclonus-Culmulus genus group: 13. Cannula linearis (Saussure, 1861); 14. Glyphoclonus miripennis Karsch, 1896; 15. Culmulus stramineus Uvarov, 1953. Figs 16–18. Afrophlaeoba genus group: 16. Paralobopoma gracilis (Ramme, 1929); 17. Afrophlaeoba usambarica (Ramme, 1929); 18. Chokwea burri Uvarov, 1953. Figs 19, 20. Duronia genus group: 19. Duronia chloronota (Stål, 1876); 20. Duroniella laticornis (Krauss, 1909). Figs 21, 22. Sumba-Rhabdoplea-Panzia genus group: 21. Rhabdoplea munda Karsch, 1893; 22. Sumba roseipennis I. Bolívar, 1912. Fig. 23. Ocnocerus-Anacteana genus group: 23. Ocnocerus diabolicus Karsch, 1893. Figs 24–30. Tribe Gymnobothrini: 24. Zacompsa festa Karsch, 1893; 25. Coryphosima stenoptera (Schaum, 1853); 26. Chirista compta (Walker, 1870); 27. Comacris semicarinatus (Gerstaecker, 1869); 28. Gymnobothrus pullus (Karny, 1915); 29. Gymnobothrus lineaalba I. Bolívar, 1889; 30. Malcolmburria angolensis Uvarov, 1953. Figs 31–34. Tribe Pargaini: 31. Acteana alazonica Karsch, 1896; 32. Odontomelus scalatus (Karsch, 1896); 33. Machaeridia bilineata Stål, 1873; 34. Parga cyanoptera Uvarov, 1926. Fig. 35. Unclassified genera: 35. Xerophlaeoba deserticola (Krauss). All scale-lines represent 1 mm: that under Fig. 1 applies to Figs 1 and 2; that under Fig. 3 applies to Fig. 3; that under Fig. 4 applies to Fig. 4; that under Fig. 12 applies to Figs 5–39.