12 PHOCEEDlNdS OF THE XATKtXAL Mf'SEUAI. vot.xs 



bro;i<l a8, or nearly as broud as, the lobes themselves; of the feniale distinctly 



or stroii^ly transverse, fully as liroad as or (and jjfencrally) broa<ler tlian tli»- 



lobes; nietnsternal lol)e8 of male K*''>®ra]ly distinctly distant, occasionally 



upi>roxiraate; of the female generally more distant, the interspace in the latt' i 



generally as wide as or wider than the frontal costa; tegndna typically 



abbreviate. 



e'. Face almost vertical; eyes small, but prominent and widely distant; pr«»- 



notum constricted in the middle, with deeply impressed transverse sulci, and 



the lateral lobes not obliijuely truncate apieally in front; distinct lateral 



carinae 20. PeudroUttix (i>. 91}. 



«-. Face a little oblicjue; eyes rather large, not very prominent, and not 

 greatly distant; pronotum not, or but feebly, constricted in the middle, 

 with generally feebly impressed transverse sulci and the lateral lobes 



obliquely trnncat<» a]dcally on the anterior seeticuj 21. I'odisir.a (j). 94i. 



[./■'. Pronotum of subec^ual wid*h, the sides nearly jiarallel; subgenital 



plate of male normal rodisma,8.s. 



/-. Pronotum enlarging posteri»»rly, conspicuously in the female; sub- 

 genital plate of male ;xoeptionally expanded, laterally tumid and elevated 



premarginally E u p o d i s m p .] 



d-. Interspace between mesosternal lobes generally longer or much longer 

 than broad in the male, almost never (see McIaiwpJus niontainis »ud M. horealis) 

 in the least broader than long even when the sides of the interspace are 

 posteriorly divergent; generally quadrate in the female but more variable 

 than in the other sex, sometimes as narrow as there, more often subtransverse. 

 o«'casi()nally in someshort-winged forms (asin Melanoplux artemiHiae, M. militarh, 

 M. altitudiHum and Jsemophta monfanun) distinctly transverse; in both sexes 

 always distinctly, generally much, narrower than the lobes (except in the 

 females of the cases just cited, where they are barely narrower) ; metasternal 

 li)bes of male generally attiugent or subattingent, rarely only approximate: 

 of the female less distant than in the alternate category ( J- />-c'r/'), generally 

 approximate or subapproximate, the interspace generally narrower than the 

 frontal <osta; typically the tegniina are completely developed. 

 e'. P"'ace almost vertical or a little obli(|ue, its angle with the fastigiuni 

 rarely less than 75^ ; eyes rounded oval, never more, generally less, than 

 half as long again as broad; portion of metasternum lying behind the lobes 

 transverse, more than twice as broad as long; tegniina normally present. 

 /'. Tegmina always present j sides of first abdominal segment with a dis- 

 tinct tympanum. .. 

 </'. Fastigium of vertex plane or convex; eyes separated widely, the 

 space between them twice as broad as the frontal costa; pronotum 

 furnished with distinct percurrent lateral carinae; tegmina abbreviate; 



cerci apieally acuminate 22. Paratylotropidia('p.lll). 



g^. Fastigium of vertex more or less depressed or with elevated lateral 



margins; eyes separated narrowlj, at most but little further apart than 



the width of the frontal costa; pronotum with indistinct' or no lateral 



carinae; tegmina fully developed or abbreviate; cerci variable, rarely 



acuminate apieally. 



h '. Inferior genicular lobe of hind femora with at least a darker basal 



spot or transverse band; cerci of male variable, often enlarging 



apieally. 



/'. Dorsum of pronotum rarely or never twice as long as the average 



breadth, generally only half as long again even in the male, gener- 



_ .... . i-^. -.^ ally constricted more or less in the middle; antennae e%'en when 



longest (as in Melanoplus nitidua and Jlf. ^jacArardi*, for instance) no 



In a few species they are tolerably distinct. 



