83 
KEY TO THE SUB-FAMILIES AND GROUPS. 
* V 
A. Promonotum extending back only to or but a 
short distance upon the base of the elytra; pads 
between the tarsal claws. Sub-fam. Acridine. 
a. Face distinctly oblique or sloped under toward 
the breast in both sexes; the prosternum not 
spined or tuberculated, except in Mermiria. Group 1. Truxalini. 
aa. Face vertical or nearly so, sometimes curved 
near the clypeus, and sometimes slightly oblique 
in the male. 
b. Prosternum neither spined or tubercled, except 
in Stetheophyma, where it is armed with a blunt 
tubercle. Group 2. Oedipodini. 
bb. Prosternum armed with a distinct spine or 
tubercle. . Group 3. Acridini. 
AA. Pronotum extending back to or beyond the tip 
of the abdomen; tarsal claws without pads be¬ 
tween them. Sub-fam. Tettigin^e. 
KEY TO THE SUB-FAMILIES AND GENERA. 
i 
I. Pronotum extend ig back only to or but a 
short distance upon the elytra; pads between 
the tarsal claws; prosternum drawn up, not in 
the same plane as the sternum. Sub-fam. Acridinae. 
A. Face distinctly oblique, or sloped under toward 
the breast in both sexes; prosternum some¬ 
times spined, sometimes not. Groupe 1 . Truxalini. 
a. Prosternum armed with a spine; face very 
oblique. Gen. Mermiria. 
aa. Prosternum unarmed. 
b. Antennae enlarged and flattened near the base, 
tapering to the apex; face very oblique; sides 
of the pronotum parallel; elytra and wings 
longer than the abdomen. Gen. Truxalis. 
bb. Antennae filiform, sometimes with the apical 
portion flattened and slightly enlarged, but 
never enlarged at the base (except in the fe¬ 
male of Syrbula ); face always distinctly, but 
sometimes only moderately oblique in the fe¬ 
males. ' 
