THE CANADIAN ENTOMOLOGIST. 10 



ee. Costal margin of the tegmina only very slightly convex, 

 f. The posterior wings with four apical 



cells* Prunasis, Stal. 



ff. The posterior wings with five apical 



cells Calyria, Stal. 



bb. Basal abdominal segment of the male expanded or dilated above 

 so as to conceal the timbal ; the operculum well developed. 

 c. The cross-vein at the base of the second apical cell of the 

 tegmina not oblique, forming right angles with the longi- 

 tudinal veins Proarna, Stal. 



cc. The cross-vein at the base of the second apical cell oblique, 

 forming angles greater or less than a right angle with the 

 longitudinal veins, 

 d. The postcostal marginal and the postcostal ulnar veins 

 not parallel, more distant towards the apex, 

 e. Metasternum not at all or slightly elevated at middle, 

 elevated part not produced in front at 



middle Tympajioterpes, Stal. 



ee. Metasternum transversely elevated, elevated part longi-. 

 tudinally impressed, slightly produced in front, the 

 produced part truncate or sinuate. . .Fidicina, A.-S. 

 dd. The postcostal marginal and the postcostal ulnar veins 

 parallel, not more distant towards the apex, 

 e. Basal area of the tegmina rarely twice as iong as wide ; 

 apex of the clypeus truncate or subsinuately 



truncate Cicada, Linn. 



ee. Basal area of the tegmina twice as long as wide ; apex 

 of the clypeus subacuminate or very slightly 



rounded Tettigia, Kol. 



AA. Lateral margins of the pronotum angulately dilated. 



b. Ulnar veins contiguous at base, interior ulnar area narrowed at 



base Zammara, A.-S. 



bb. Ulnar veins distant at base, interior ulnar area with its sides 

 subparallel Odopoea, Stal. 



*Stal is not consistent regarding the number of apical cells in this genus; in his 

 original description, Rio Jan. Hem. Faun., II., 22, he says, " Alae areblis apicalibus 

 quattuor, and in Hemip. Africana, IV., 9, says, All's areis apicalibus sex, while Ash- 

 mead, Entomol. Amer., IV., 141, says, " Elytra with 4 apical cells." 



