ACRIDIIDAE OEDIPODINAE 33 



Tribes of Oedipodinae. 



a 1 . Outer margin of hind tibiae with no apical spine next the 

 spurs. ........ Oedipodini. 



a' 2 . Outer margin of hind tibiae with an apical spine next the 

 spurs. ........ Eremobiini. 



Oedipodini. 



This tribe is very varied in type, no less than twenty-three 

 genera occurring in the United States, out of the sixty odd 

 recorded by Saussure from the whole world. All our genera are 

 neogeic and in large part confined to the United States or shared 

 only with Mexico. 



Genera of Oedipodini. 



A l . Interspace between the metasternal foramina linear, or dis- 

 tinctly longer than broad in the male, narrower than the inter- 

 space between the mesosternal lobes in the female. 



b \ Tegmina subcoriaceous, densely and irregularly reticulate, 

 only at the apex remotely (but scarcely regularly) areolate ; 

 the intercalary vein nearer the median than the ulnar vein ; 

 wings brightly colored, red or yellow at base ; none of the 

 veins incrassate and no costal stigma ; ulnar area not notice- 

 ably dilated. Arphia Stal. 



b 2 . Nearly the whole apical half of the tegmina, at least in the 

 discoidal field, membranaceous, traversed by straight veinlets ; 

 the intercalary distant from the median vein ; wings with 

 dilute coloring, nebulous ; the veins next the costal margin and 

 frequently, in the male, the median vein incrassate ; costa with 

 a dusky stigrna ; ulnar area dilated, with remotely scalariform 

 venation. 



c 1 . The intercalary vein of the tegmina running midway 

 between the median and ulnar veins, only apically a little 

 approximating the former; veins of the wings slightly or 

 scarcely incrassate. . . Chortophaga Saussure. 



c 2 . The intercalary vein of the tegmina distinctly nearer the 

 ulnar than the median vein; the veins of the wings referred 

 to (under 2 ) distinctly incrassate in the male. 



