200 PROCEEDINGS OF THE AMERICAN ACADPJMY. 



the female distinctly or strongly transverse, fully as broad as or 

 (and generally) broader than the lobes ; metasternal lobes of male 

 generally distinctly distant, occasionally approximate ; of the female 

 generally more distant, the interspace in the latter generally as wide 

 as or wider than the frontal costa ; tegmina typically abbreviate. 

 e^. Face almost vertical ; eyes small but prominent and widely 

 distant; pronotum constricted in the middle, with deeply im- 

 pressed transverse sulci, and the lateral lobes not obliquely 

 . truncate apically in front; distinct lateral carinas. 



Dendrotettix. 

 e-. Face a little oblique ; eyes rather large, not very prominent 

 and not very distant ; pronotum not, or but feebly, constricted 

 in the middle, with generally feebly impressed transverse sulci, 

 and the lateral lobes obliquely truncate apically on the anterior 

 section Podisma. 



LP- Pi'onotum of subequal width, the sides nearly parallel ; 



subgenital plate of male normal Podisma s. s. 



p. Pronotum enlarging posteriorly, conspicuously in the 

 female; subgenital plate of male exceptionally expanded, 

 laterally tumid, and elevated premarginally . Eupodisma.] 

 d^. Interspace between mesosternal lobes generally longer or much 

 longer than broad in the male, almost never (cf. Mel. montanus 

 Thom.) 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, occasionally in some 

 brachypterous forms (as in Mel. artemisice Brun., Mel. militaris 

 Scudd., Mel. altitudinum Scudd., and Asemoplus) distinctly trans- 

 verse ; 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 lobes of male generally 

 attingent or subattingent, rarely only approximate ; of the female 

 less distant than in the alternate category (^- i- c^ (fi), generally 

 approximate or subapproximate, the interspace generally narrower 

 than the frontal costa ; typically the tegmina are completely 

 developed. 



e^. Face almost vertical or a little oblique, its angle with the 

 fastigium rarely less than 75° ; eyes rounded oval, never more 

 generally less than half as long again as broad; portion of 



