ACHIDIDA-:. 



■■n 



21. Pkkisacris. 



22. Hemiackis. 

 23. moephacris. 



24. Prosackis. 

 25. Ceracris. 



Faiii. 7. OEDIl'ODID.E. 



A. Hind le<2;s formed for leaping. 

 a. Body uot much compressed. 

 * Head not very prominent, 

 t Hind border of the prolhorax not truncated 



+ Prolhorax not keeled. 

 ++ Prothorax keeled. 



§ Prosternum with a transverse ridge. 

 §^ Prosternum with no transverse ridge. 

 X Keel of the prothorax much notched. 

 X X Keel of the prolhorax not much notched. 



o Hind femora lonj,'. 

 H- Eyes prominent. - - " 



H — h Eyes not prominent. 



++ Anlennte long, very slender. 

 ++++ Antennae moderately long, not very slender. 

 K" Antennae not dilated at the lips, 

 -j- Prosternum smooth. 

 — Costa of the fore wings not dilated. 

 = Vertex much acuminated in front of the eyes. 



v Antennae depressed. 



A Eves not oval. - - - 16. Thagocephala. 



aa Eves oval. ... 17. Oxvcouyphus. 



vv Antennae rather long, not depressed. - 12. Peracinema. 



= =: Vertex not much accuminated in front of the eyes. 



V Vertex with no lateral furrows. - - 1. Pachytylus. 



vv Vertex with conspicuous lateral furrows. 



A Head narrow. 



> Prothorax with three distinct keels. - 7. Stenobothrus. 



> > Prothorax with the middle keel only distinct. - 8. Epacronia. 

 AA Head rather thick, more globose. 



> Keel of the front disappearing near the middle ocellus. 



5. Staueonotus. 



> > Keel of the front extending almost to the clypeus. 



> Fore part of the prosternum not elevated. - 2. (Edipoda. 



> > Fore part of the prosternum much elevated transversely. 



4. Uenisa 



Costa of the fore wings dilated, 



++ Prosternum slightly tuberculate. 



— Prolhorax with three distinct keels. 

 _ — Prothorax with no lateral keels. 

 «?it^ Antennae dilated at the tips. 

 ++++++ Antennae short, fusiform, 

 oo Hind femora short, broad, 

 -r Aulennse approximate. 

 -*--i- Antennae remote. 



++ Prothorax not much elongated. 



uTi Head not very large. 



-4- Hiud border of the prothorax not rounded. 



9. Arcypteha. 



10. Stetheophyma. 



11. Parapleurus. 



13. Gomphocerus. 



15. Phlocerus. 



27. Chrotogonds. — 



28. Thrinchus. 



