PSYCHE. 



ARKANSAS MELANOPLI. — II. 



by jerome mcneill, fayetteville, ark. 



Key to Melanoplus. 



A' Tegmina rarely shorter than the abdomen when much shorter the species are 

 large, (more than one inch in length) and robust. 



B' Size large, never less than one inch in length usually much more, space 

 between the eyes more than twice the width of the basal joint of the antennae, 

 hind tibiae with a broad pale annulus (sometimes only apparent on the exterior 

 face) preceded by a black sub-basal ring, median carina never obsolete upon the 

 prozone, though often indistinct. 



C Tegmina scarcely ever spotted and never striped on the anal field, hind 

 tibiae and under surface of hind femora yellow, sides of prozone not expand- 

 ing posteriorly ....... Differentialis Uhler. 



C^ Tegmina always maculate upon the discoidal field and frequently striped 

 on the anal field, hind tibiae never yellow, either red or purplish, sides of the 

 prozone plainly expanding posteriorly. 



D' Hind femora rarely banded on the disk of the outer face, tegmina 

 usually exceeding slightly or considerably the hind femora, never much 

 shorter than the abdomen, hind tibiae red or purplish . Bivittatus Say. 

 D'^ Hind femora generally very distinctly banded upon the disk of the 

 outer face, tegmina much shorter than the abdomen, hind tibiae never 

 purplish. ......... riohi T/ios. 



B^ Size medium or small, space between the eyes not more than twice the 

 width of the basal joint of the antennae, hind tibiae usually red without a pale 

 annulus preceded by a black sub-basal spot or ring, rarely blue with the black 

 followed by a pale ring, tegmina about equalling or more or less exceeding the 

 abdomen. 



C Second transverse sulcus of the pronotum not twice as distant from the 

 third as from the first, tegmina very rarely falling short of the epctremity of the 

 hind femora. 



