MO. 11 24. REVISION OF THE MEL AX OP LI SC UDDER. H 



A 2 . Lateral margins of subgeuital plate of male suddenly ampliate to a considerable 

 degree at the base; or if not to a considerable degree, then the entire margin rather 

 strongly convex or sinuate. 



& 1 . Subgenital plate of male furnished with a distinct subapical tubercle (i. e., one 

 in which the apical margin does not pass through and form a part of the summit 

 of the tubercle, but where it is distinctly separated from that summit), but not 

 otherwise tumesceut.' 



c 1 . Median carina of pronotum well developed and equally developed through- 

 out, accompanied on the front of the prozona by distinct lateral carinae; pro 

 sternal spine sharply acuminate; tubercle of subgenital plate directed wholly 

 backward, occupying the middle of the terminal portion of the plate; furcula 



distinctly developed 16. Eotettix (p. 53). 



( -'. Median carina of pronotum feebly developed and generally much more feebly 

 on the prozona than on the nietazona, accompanied by no lateral carinae what- 

 ever; prosternal spine bluntly acuminate; tubercle of subgenital plate directed 

 upward or upward and backward, occupying the upper extremity of the ter- 

 minal portion of the plate. 



rf 1 . Body relatively slender and compressed, not much enlarged at the rneta- 

 thorax, particularly in the male; disk of the pronotum tectiform, 3 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 ovipositor fully exserted. 



17. Hesperotettix (p. 55). l^ 



d' 2 . Body relatively short and stout, considerably enlarged at the metathorax 

 even in the male; disk of pronotum gently convex transversely, the prozona 

 slightly and independently tumid with no median carina, thus distinguishing 

 it from the metazona ; 3 hind femora relatively short and stout ; apical tubercle 

 of male abdomen not very prominent; furcula- scarcely or not apparent; termi- 

 nal segments of female abdomen abbreviated, the ovipositor only partially 



, exserted 18. Aeoloplus (p. 68). (/ 



l^ft 2 . Subgenital plate of male with 110 distinct subapical tubercle, but often apically 

 prolonged or tumescent. 4 



c 1 . Meso- and metastethia together, in both sexes, no longer or scarcely longer 

 than broad; metastethium narrowing 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 ; cerei of male very simple, subconical, 



straight; ovipositor half concealed 19. Bralynotes (p. 80). ^ 



-,c 2 . Meso- and metastethia 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 1 . Interspace between mesosternal lobes of male distinctly transverse, 5 as 



1 See note under alternate category. 



2 This feature is not so apparent in the first three species of Hesperotettix as in the 

 others. 



3 This feature is less marked in Ae. tenuipennis and Ae. elegans than in the others. 



4 There is a minute subapical tubercle in some species of the flabellifer series of 

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

 in the species of the alternate category ( J 2 ft 1 ) the cerci are very slender and tapering. 



fi ln many cases the interspace is truncato-cuneiform or broadly clep.'ydral, in 

 which cases the breadth is to be measured in the middle. In a single species of 

 Podisma, P. dairisama, the interspace is slightly longitudinal. 



