ACR1DIIN.E. 221 



less in the middle ; antennae, even when longest, no 

 longer than the hind femora. 



170 (171). Head not large in proportion to the pronotum, nor 



prominent, but little longer than the prozona, unless 

 the latter is distinctly transverse; pronotum in no 

 way subsellate, nor produced in front ; tegmina, when 

 fully developed, narrow ; cerci of the male very 

 variable in shape Melanoplus, Stal. 



171 (170). Head large in proportion to the pronotum, especially 



above, and prominent, nearly half as long again as the 

 long prozona; pronotum faintly subsellate, feebly 

 produced in front to receive the head ; tegmina, when 

 fully developed, broad and subequal, hardly tapering 

 in the distal half; cerci of the male styliform, the 

 last ventral segment very narrow, the margin not 

 apically elevated Phojitaliotes, Scudder. 



172 (169). Dorsum of the pronotum twice as long as its average 



breadth, at least in the male, with no median con- 

 striction ; antennae, at least in the male, generally 

 longer than the hind femora and much more than 

 twice as long as the pronotum, generally twice as 

 long as the head and pronotum together; prozona 

 only about one-third longer than the metazona . . Paroxya, Scudder. 



173 (168). Inferior genicular lobe of the hind femora wholly pallid, 



with no dark basal spot or transverse band ; cerci of 

 male conical, subcorneal, or basally bullate, always 

 apically pointed. 



174 (175). Last ventral segment of the male abdomen terminating 



in a pronounced tubercle; prosternal spine slender; 



tegmina and wings complete Poscilotettix, Scudder. 



175 (174). Last ventral segment of the male abdomen, even when 



apically angulate, not furnished with an apical 

 tubercle; prosternal spine stout; dorsal disk of 

 prozona tumid, independently of the metazona ; 

 tegmina fully developed or abbreviated CEdaleonotus, Scudder. 



176 (167). Tegmina wanting; the sides of first abdominal segment 



not provided with a tympanum Philocleon, Scudder. 



177 (128). Posterior tibise armed on the external edge often with 



six or seven spines, never with more than eight. 



178 (185). Frontal costa straight, between the antennae very little 



or not at all produced. 



179 (182). Frontal costa percurrent. Eyes narrow, fully twice as 



long as broad. Tegmina variable. 



180 (181). Tegmina and wings complete. Hind femora with the 



