92 Annals Entomological Society of America [Vol. XIII, 



in Kansas. Gypona spreta Fowl seems to be another variety of 

 cinerea with a still longer and more sharply angled vertex than 

 ka7isana. 



Gypona (Prairiana) cinerea var. cinerea Uhl. 



Stout gray or smoky cinereous forms with the elytra slightly 

 longer than the body in the females, distinctly folded and 

 narrowing posteriorly giving a stout, short form. The males 

 have slightly longer elytra but are much shorter and stouter 

 bodied than var. kansana. This variety has been taken from 

 Colorado and Montana, east to Iowa. Most examples have 

 been swept from upland prairie grasses. 



Gypona (Prairiana) cinerea var. subta n. var. 



Resembling variety cinerea, but much smaller and shorter 

 with short rounding elytra exposing the apical segment of the 

 abdomen. These appear to be true brachypterus forms with 

 the appendix wanting and the apical cells rudimentary, but the 

 under wings are as long or slightly longer than the elytra and 

 these forms may make short flights. The females are cinereous, 

 quite heavily irrorate with fuscous, while the males are still 

 darker, appearing in extreme cases as smoky. Length, females, 

 5-6 mm. ; males, 5 mm. 



Described from two pairs from Fort Collins, Colorado. 

 Taken by the writer from under the clumps of Schedonnardus 

 texanus, a "short grass" clump common on the plains. The 

 larvae were taken into the laboratory in May. The adults 

 emerged in late May and June. This is remarkably early for 

 this group and appearance might be taken to indicate two 

 generations, but is probably only an adaptation to the early 

 maturity of the buffalo grass and the other short grasses. This 

 variety is quite remarkable in the whole Gypona group and 

 superficially resembles an Acocephalus or even a Penthemia. 

 When compared 'with the giant variety ponder osa it looks like 

 a veritable pigmy. One wonders whether both size and early 

 maturity are not adaptations to "short grass" conditions. 



2. Gypona (Prairiana) miliaris Stal. 



Gypona fraterna Spangb.; Gypona negotiosa Gibs. 



This species resembles cinerea in general form and like that 

 species is widely variable in size and color. The vertex is- 



