IOWA ACADEMY OP SCIENCES. 67 



about half as wide as the ultimate segment; the outer margins 

 rounding to before the middle, then regularly narrowing to the 

 acute tips, three times as long as their basal width, pygofers long, 

 narrow, thickly set with coarse spines. 



Length $ 4-4.25 mm., $ 3 mm.; width 9 1.25 mm,, $ 1 mm. 

 Described from numerous specimens collected at Port Collins, 

 Antonito and Wray, Colo., and Stratton Neb. The larvae and 

 adults seem to be strictly confined to two species of grass that 

 form mat-like clumps, Schedonnardus texanus and Muhlenhergia 

 gracillima, where they may be found abundantly, crawling 

 around under the margins of the clumps, in May and June. 



Memnonia Jraterna N. SP. 



Form of conso&rma nearly, smaller, ovipositor shorter, scarcely 

 exserted; color buff, the vertex lighter; male similar to the female 

 in size and color. Length 3-3.5 mm; width 1 mm. 



Brachypterous form, males and females, vertex as long as the 

 pronotum, two-thirds as long as the width between eyes, convex, 

 the margin rounding, front twice wider at base than at apex, a little 

 longer than its greatest width, forming an acute angle with the 

 vertex; clypeus slightly longer than wide; about half the length of 

 the front; elytra exposing the last abdominal segment and the 

 pygofers, their posterior margins broadly rounding, apical cells 

 minute; color, varying from a light, straw color on the vertex, to a 

 creamy buff, with traces of a white bloom on the elytra; eyes red- 

 dish brown, apical nervures and a narrow margin on the abdominal 

 segments fuscous; below, pale buff. 



Genitalia; female, similar to consohrina, except the ultimate seg- 

 ment, less than twice the width of the penultimate, and the ovipos- 

 itor much shorter, scarcely exceeding the pygofers; male, ultimate 

 segment longer than in consohrina, valve longer and narrower, 

 plates shorter than the pygofers, not over twice longer than wide. 

 Described from numerous specimens taken from the same 

 grasses as the former species. They appear about a month 

 later in the season. 



DORYCEPHALUS KUSCH. 



This genus, founded on a species from northern Europe, has 

 two representatives in this country, now known from the 

 Mississippi to the Rockies, but probably much more widely 

 distributed, as, unless definitely searched for they are rarely 

 seen, even where abundant. 



A. Head broadly foliaceous, front transversely convex, elytra 

 more than half the length of the abdomen in both sexes 

 platyrhynchus Osb. 



AA. Head narrowly foliaceous, front strongly concave its 

 whole length, elytra less than half the length of the abdo- 

 men in both sexes vanduzei O. &, B. 



