10 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



f l . Last dorsal segment of male furnished rnesially with a pair of slightly 

 protuberant rounded lobes; cerei of male compressed laminate, beyond 

 the slightly narrowing basal portion equal or stibequal, the tip curved 

 downward or inferiorly angulate at apex. 



g l . Prosternal spine erect ; interspace between mesothoracic lobes of male 

 nearly twice as long as broad; fore and middle femora of mule notice- 

 ably gibbous; subgeuital plate of male terminating in a large conical 



tubercle 6. Barytettix (p. 27). 



g". Prosternal spine retrorse; interspace between mesothoracic lobes of 

 male only a little longer than broad; fore and middle femora of male 

 only slightly gibbous; subgenital plate of male with no apical tubercle. 



7. Phaulotettix (p. 29). 



/ 2 . Last dorsal segment of male entirely without projecting lobes or fur- 

 cula in any form, unless as exceptionally broad and short sessile plates; 

 cerci of male (except in Cephalotettix) apically acuminate or curved 

 upward. 



1 . Head large and eyes, at least in male, large and very prominent, the 

 breadth of the head distinctly exceeding the greatest width of the pro- 

 notum; interspace between mesothoracic lobes of male slightly trans- 

 verse 8. Cephalolettix (p. 30) . 



(f. Head normal and eyes not very prominent even in the male, so that 

 the breadth of the head does not exceed the greatest width of the pro- 

 notum; interspace between mesothoracic lobes of male distinctly longer 

 than broad. 



ft 1 . Tegmina lobiform; subgenital plate of male protruding beyond 

 the tip of the supraanal plate by less than half the length of the 

 latter; cerci of male compressed, subequal, the tip broad. 



9. KliaMoiettix (p. 32). 



h 2 . Tegmina linear ; subgenital plate of male protruding beyond the 

 tip of the supraanal plate by much more than half the length of the 

 latter; cerci of male tapering from the base, the tip acuminate. 



10. Cyclocercus (p. 36). 



e 2 . Furcula of male consisting of a pair of parallel, attingeut, cylindrical 

 prominences, generally at least twice as long as broad. 



/'. Tegmina lobiform; interspace between mesosternal lobes of male 

 slightly transverse ; cerci of male forming compressed, subequal laminae. 



11. Sinaloa (p. 10). 

 / 2 . Tegmina wanting ; interspace between mesosternal lobes of male longer 



than broad; cerci of male styliform, conical 12. Paraidemona (p. 41). 



d*. Tegmina fully developed or abbreviate, never much if any shorter than 

 thepronotum; hind margin of pronotuin distinctly angulate; fore and middle 

 femora scarcely more gibbous in the male than in the female (except in some 

 species of Campylacantha). 



c 1 . Tegmma fully developed; disk of pronotum nearly flat, the lateral lobes 

 nearly at right angles to it, the posterior margin rectangulate or subrectau- 

 gulate; prosterual spine quadrate, appressed, broadly truncate. 



13. Aidemona (p. 44). 



e 2 . Tegmina abbreviate; disk of pronotum tectiform, the posterior margin 

 obtusangulate; prosterual spine more or less conical and acuminate. 

 /'. Head not prominent, the summit very slightly arched longitudinally; 

 prosternal spine erect; furcula of male composed of projecting cylindrical 



lingers; surface of the body very feebly pilose 14. Hypochlora (p. 46). 



f*. Head prominent, the summit strongly arched longitudinally; proster- 

 ual spine more or less retrorse ; furcula of male reduced to slight, scarcely 

 projecting lobes; surface of body rather densely pilose. 



15. Campylacanlha (p. 48). 



