CllKOTOGONL'S. 161 



14 (9) Outer apical spine of pos- 



terior tibite very distinct. 



15 (16) Posterior sulcus of pro- 



imtuni scarcely behind 

 the middle ; body robust ; 

 te^i'miua and wings fully 



developed _ Pcecilocerus, Serv., p. 170. 



1<> (lo) Posterior sulcus of pro- 

 notum placed some dis- 

 tance behind the middle. 



17 (18) Tegmina and wings absent. Orthacris, Bol., p. 184. 



18 (17) Tegmina abbreviated. 



U) (20) Tegmina elliptical ovate, 

 about the same length as 

 the pronotum ; body 

 slender Chlorizeina, Brunn.,* p. 174. 



20 (19) Tegmina very narrow, 



linear, longer than the 



pronotum Colemania, Bol.,* p. 188. 



21 (8) Posterior lobe of pronotum 



convex, raised above the 

 level of the anterior lobes, 

 with strong rugte ; abdo- 

 men with dorsal callosity. Aularches, Stal, p. 108. 



22 (1) Tegmina much dilated to- 



wards the apex, obliquely 

 truncate, more or less 

 leaf-like Trigonopteryx, Charp., p. 189.] 



Genus CHEOTOGONUS. 



Chrotof/onus, Serville, Ins. Orth. 1839, p. 702. 



Type, Ommcxijclia liujuhre, Blauch., from Egypt. 



Jianffe. Africa, Asia, Australia. 



Size small, body short and stout. Head snial], narrowed 

 towai'ds the front ; antenna? short, filiform, inserted close too-ether 

 between the eyes. Pronotum more or less rugose, much widened 

 behind ; hind border obtusely angulated or rounded. Teo-niina 

 generally shorter than the abdomen, and nodose; wings often 

 abbreviated. Hind femora moderately stout ; hind tibia? sliohtly 

 thickened towards the extremity, with no terminal sjnne on the 

 upper outer carina; the other terminal spines of nearly equal 

 length. 



Key to the Sjpecies. 



1 (6) Wings well dcA-eloped, longer 



or scarcely shorter than the 

 tegmina. 



2 (3) Tegmina not extending to the 



apex of the hind femora .... jxdlidtis, Blanch., p. 162. 



3 (2) Tegmina extending to apex of 



hind femora. 



4 (5) Pronotum with the posterior 



angles projecting, very acute . rvbcrtsi, sp. n., p. 164. 



M 



