44 GUIDE TO ORTHOPTERA 



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 prom- 

 inent ; furcula present as distinctly projecting lobes ; ter- 

 minal segments of female abdomen not abbreviated, the 

 ovipositor fully exserted. . Hesperotettix Scudder. 

 d 2 . Body relatively short and stout, considerably enlarged 

 at the metathorax even in the male; disk of pronotum 

 generally convex transversely ; the prozona slightly and 

 independently tumid with no median carina, thus dis- 

 tinguishing it from the metazona ; f hind femora relatively 

 short and stout ; apical tubercle of male abdomen not very 

 prominent ; furcula scarcely or not apparent ; terminal 

 segments of female abdomen abbreviated, the ovipositor 

 only partially exserted. . . Aeoloplus Scudder. 

 b 2 . Subgenital plate of male with no distinct subapical tubercle, 

 but often apically prolonged or tumescent. $ 



c \ Meso- and metastethium together, in both sexes, no 

 longer or scarcely longer than broad ; metastethium narrow- 

 ing but little posteriorly, 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. 



JSradynotes Scudder. 



c 2 . 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 gen- 

 erally fully exserted. 



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



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



$ There is a minute subapical tubercle in some species of the flabellif er group of 

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

 of the alternate category (A 2 b 1 ) they are very slender and tapering. 



