42 IOWA STUDIES IN NATURAL HISTORY 
being furnished with conspicuous spines. The spines on the 
anterior femora are peculiar in being bifid at the apex. This 
armature is entirely lacking in the male. 
But five specimens of A. spinifrons are at hand from Iowa; 
two of these are from Iowa City and were taken March 20 and 
April 21 respectively; the other three specimens are from Lake 
Okoboji; two of these were taken in June, the other in July. 
They were swept from blue grass on the sandy knolls immediately 
to the south and west of the lowa Lakeside Laboratory. Al- 
though extended and persistent effort has been put forth in 
looking for these insects in presumably favorable situations such 
as sand blowouts and ridges, beneath bark and leaves in sandy 
places and about the roots of various plants in such areas our 
searches have been almost in vain. Professor Osborn recorded 
the species from Ames and indicated its status in the state as 
rare. It is found over practically the entire United States as 
far west at least as Texas and Colorado. Say’s type came from 
Missouri. Zimmer (l. c.) records but a single specimen from 
Nebraska. 
Amnestus pusillus Uhler (Puate II, Ficure 6) 
1876. Amnestus pusillus Uhler, Bull. U. S. Geol. Geogr. Surv., IT, no. 5, 278. 
1877. Amnestus pusillus Uhler, Bull. U. S. Geol. Geogr. Surv., III, 371. 
1883. Amnestus spinifrons Signoret, Ann. Soc. Ent. France, III, Ser. 6, 367, Pl. 
10, fig. 197. 
1895. +tAmnestus subferrugineus Gillette and Baker, Hem. of Colo., 11. 
1904. Amnestus pusillus Van Duzee, Trans. Am. Ent. Soc., XXX, 25. 
1911. Amnestus pusillus Zimmer, Univ. Neb. Contrib. Dept. Ent., no. 4, 25. 
Form of A. spinifrons but not quite so convex above and the entire sur- 
face is more uniformly, finely and densely punctured. General color 
pale reddish brown, the legs, rostrum and antennae pale yellowish. Head 
rounded in front, longer than wide; tylus longer than juga and furnished 
with four long teeth. Antennae slender, the second segment minute, the 
third, fourth and fifth segments united by very slender processes. Pro- 
notum proportionately narrower anteriorly than in A. spinifrons, rather 
densely, coarsely punctured over the entire surface, the transverse groove 
deeply impressed, not reaching to the margins; humeri and posterior mar- 
gin more finely punctured; antero-lateral margins distinctly paler than 
remainder of upper surface. Scutellum closely punctured, small, trian 
gular with apex sharply pointed; a submarginal impressed line in which 
the punctures are regularly arranged. Hemelytra distinctly paler than 
pronotum, closely, finely punctate except on disk; corium distinctly sin- 
uate at apex; external angle scarcely surpassing the abdomen; membrane 
white, surpassing the abdomen but much shorter than corium. Venter 
