26 GUIDE TO ORTHOPTERA 



e '■^. Metazoiia barely longer than prozona, onl}'- slightly 



carinate. .... Acrocara Scudder. 



d"-. Upper half of head only feebly conical, more or less 



tumid; face below fronto-vertical process distinctly 



oblique; antennae less than half as long as tegmina. 



e^. Vertex of the head forming an acute angle with 



the face ; terapora nearly plane triangular spaces. 



Mootettix Bruner. 

 e ^. Vertex of the head forming an obtuse angle with 

 the face ; tempora impressed, trapezoidal. 



Ziigurotettix McNeill. 

 c '^. Head as viewed laterally less, though distinctly, ascend- 

 ing. 



d^. Antennae much longer than the face ; lower margin 

 of lateral lobes anteriorly excised, broadly exposing the 

 pleura, .... Pedioscirtetes Thomas. 



d^. Antennae shorter than the face; lower margin of lat- 

 eral lobes nearly horizontal throughout, scarcely exposing 

 the pleura. .... Gymnes Scudder. 



52. Head elevated above the pronotum at most only by the 

 feeble tumescence of the occiput, and not otherwise forming 

 any angle with the pronotum. 



c^. Mesosternal lobes separated by a space almost linear in 



its nan-owest part; metasternal lobes aj^proximate in both 



male and female. .... Menniria Stal. 



c ■^. Mesosternal lobes separated b^'^ a space never much longer 



than broad, generally broader than long ; metasternal lobes 



rarely approximate in the male, very rarely in the female. 



d^. Antennae triquetrous, or strongly depressed at the base 



and distinctly acuminate ; pronotum with the lateral lobes 



vertical and straight and the lateral carinae not at all 



sinuate ; median carina of the pronotum generallj' cut 



much behind the middle ; the disk plain and unstriped. 



e ^. Tegmina exceeding the abdomen considerably in 



both sexes (in some large females but little); lateral 



carinae of the pronotum quite as distinct as the median ; 



spurs at the apex of the posterior tibiae on the inner 



side about equal. . . . Tryxcdis Fabricius. 



