SCUDDER. — GENERA OF MELANOPLI. 199 



d\ Body relatively slender and compressed, not much enlarged 

 at the raetathorax, particularly in the male ; disk of the pronotum 

 tectiform,* the prozona not distinguished from the metazona either 

 by its plane or by any lack of a median carina, which latter is 

 generally marked in color ; pronotum fully half as long again as 

 broad; hind femora long and slender; apical tubercle of male 

 abdomen prominent; furcula present as distinctly projecting lobes; 

 terminal segments of female abdomen not abbreviated, the ovi- 

 positor fully exserted ■ . . . . Hesperotettix. 



eP. Body- relatively short and stout, considerably enlarged at the 

 raetathorax even in the male ; disk of pronotum generally convex 

 transversely ; the prozona slightly and independently tumid with 

 DO median carina, thus distinguishing it from the metazona ;t ^"nd 

 femora relatively short and stout ; apical tubercle of male abdo- 

 men not very prominent; furcula scarcely or not apparent; termi- 

 nal segments of female abdomen abbreviated, the ovipositor only 



partially exserted ^oloplus. 



b\ Subgenital plate of male with no distinct subapical tubercle, but 

 often apically prolonged or tumescent. | 



c\ Meso- and metastethiura together, in both sexes, no longer or 

 scarcely longer than broad ; metastethium narrowing but little pos- 

 teriorly, so that the portion behind the metasternal lobes is but 

 little narrower than the rest, rarely (in the male) less than three 

 fourths its width ; cerci of male very simple, subconical, straight ; 



ovipositor half concealed Bradynotes. 



c^. Meso- and metastethium together, at least in the male and 

 nearly always in both sexes, distinctly longer than the width of 

 the metastethium ; the latter rapidly narrowing posteriorly, so that 

 the portion behind the metasternal lobes is not, or is hardly more 

 than, one half the greatest width of the metastethium ; cerci of 

 male variable ; ovipositor generally fully exserted. 



d}. Interspace between mesosternal lobes of male distinctly trans- 

 verse. § as broad or nearly as broad as the lobes themselves ; of 



* This feature is not so apparent in some species as in others. 



t Tills feature is less marked in some species than in others. 



X Tliere is a minute subapical tubercle in some species of the flabellifer group of 

 Melanoplus, but in these the male cerci are exceptionally broad ; while in the 

 species of the alternate category (^1- b'^) they are very slender and tapering. 



§ In many cases the interspace is truncate-cuneiform or broadly clepsydral, in 

 which cases the breadth is to be measured in the middle. 



