218 OETHOPTERA. 



cerci of the male abruptly narrowed before the middle 

 by the excision of the inferior margin, the apical half 

 narrow ; lateral carinas of the pronotum wholly 

 wanting Ph^drotettix, Scudder. 



140 (139). Nearly the whole subgenital plate forming a blunt 



conical tubercle projecting some distance beyond the 

 supra-anal plate; cerci of the male forming broad, 

 apically decurved, subfalcate laminae; lateral carinas 

 of the pronotum more or less distinct Conalc^a, Scudder. 



141 (130). Interspace between the mesosternal lobes of the female 



generally longer than broad, sometimes quadrate, 

 rarely feebly transverse ; of the male never transverse 

 (except feebly so in Sinaloa and Cephalotettix) ; the 

 tegmina variable. 



142 (159). Tegmina never fully developed, rarely as long as the 



pronotum, lateral and ovate, or linear, or wholly 

 wanting; hind margin of pronotum distinctly trun- 

 cate or even emarginate ; fore and middle femora of 

 male (except in Phaulotettix) distinctly more gibbous 

 than in the female. 



143 (152). Furcula of the male abdomen wanting or forming a pair 



of short lobes, at most no longer than broad. 



144 (147). Last dorsal segment of the male abdomen furnished 



mesially with a pair of slightly protuberant rounded 

 lobes ; cerci of the male compressed, laminate, beyond 

 the slightly narrowing basal portion equal or sub- 

 equal, the tip curved downward or inferiorly angulate 

 at the apex. 



145 (146). Prosternal spine erect; interspace between the meso- 



sternal lobes nearly twice as long as broad ; fore and 

 middle femora of the male noticeably gibbous ; sub- 

 genital plate of the male terminating in a large 

 conical tubercle Barytettix, Scudder. 



146 (145). Prosternal spine retrorse ; interspace between the meso- 



sternal lobes of the male only a little longer than 

 broad; fore and middle femora of the male only 

 slightly gibbous ; subgenital plate of the male without 

 apical tubercle Phaulotettix, Scudder. 



147 (144). Last dorsal segment of the male abdomen without 



projecting lobes or furcula in any form, unless as 

 exceptionally broad and short sessile plates; cerci 

 of the male (except in Cephalotettiw) apically acumi- 

 nate or curved upward. 



