the Orthoplera in the British Museum. Ill) 



truncate with a small projection in the middle. Male 

 cerci oblique, or vertical, of very different shape, but never 

 armed with a tooth near the apex. 



18. (41) Pronotum not constricted before the middle, with the 



median keel not or moderately elevated. 



19. (40) Median keel of the pronotum distmct; lateral keels more 



or less distinct. 



20. (39) Male cerci oblique or vertical, hook-shaped, or recurved 



or foliaceous, always many times as long as broad, never 

 denticulate on the lower margin. 



21. (38) Elytra and wings developed, or simply shortened; male 



cerci not foliaceous. 



22. (33) Male cerci vertical, hook- shaped. 



23. (28) Male supra-anal plate with a transverse row of four 



chitinous tubercles about its middle. 



24. (27) Hind femora strongly incrassate, especially in the male; 



their lower carina practically straight from the base up 

 to beyond the middle, where it is obtusangularly bent. 

 Hind tibiae in the male distinctly curved. Prosternal 

 tubercle conical or narrowed towards the obtuse apex. 



25. (26) Elytra and wings shortened; the wings coloured.. Male 



cerci compressed laterally and dilated towards the apex. 



Amhlyphymus, gen. nov. 



26. (25) Elytra and wings fully developed ; the wings not coloured. 



Male cerci not compressed laterally and slightly thickened 

 at the apex Rhachilopis, gen. nov. 



27. (24) Hind femora not incrassate, even in the male ; their lower 



carina regularly convex. Hind tibiae in the male straight. 

 Prosternal tubercle widened towards the emarginate apex. 

 Male cerci not compressed laterally. Pronotum with at 

 least one pair of small round tubercles between the trans- 

 verse sulci Platyphymus gen. nov. 



28. (23) Male supra-anal plate with only a pair of submedian 



tubercles. 



29. (32) Lateral keels of the pronotum straight or practically so, 



Avith the transverse sulci, cutting them, very fine. Hind 

 angle of the pronotum obtuse, its sides not emarginate. 

 Prosternal tubercle with the apex truncate, or emargmate. 



30. (31) Male cerci compressed laterally, with the apex obliquely 



truncate. Male supra-anal plate transverse, with the 

 sides bisinuate and the hind angles attenuate. Wings 

 faintly coloured Calliptamicus gen. nov. 



31. (30) Male cerci not compressed laterally, with the apex obtusely 



conical, thickened basally. Male supra-anal plate quad- 



