162 GEO. H. HORN, M. D. 



The sixth ventral of the male is feebly emarginate at middle, the 

 anterior tarsi broadly dilated, in the female less dilated. 



The five specimens before me are of brownish color with the 

 head piceous. 



Post coxal process of thorax moderately long, translucent. 



This species although allied by its characters to Umhlfer, might 

 readily be mistaken for molocMnus, with which it agrees quite well 

 in form and general appearance. It differs however principally in 

 the form of the labrum. From limhifer it differs by its longer head, 

 more slender form and denser and finer punctuation. 



Occurs near the Colorado River in California, in Arizona and 

 south-western Utah. 



Q. liiubifer n. sp. (Fauvel mss.) — Head oval, longer than wide, moder- 

 ately constricted posteriorly, surface very finely alutaceous and with very 

 minute punctures sparsely placed, the usual larger punctures are disposed — 

 one at the insertion of the antennae, one at the middle of the margin of the 

 eye, another above the posterior border of the eye and one immediately behind 

 the eye around which puncture are numerous smaller ones. Labrum bilobed. 

 Eyes oval, slightly oblique. Antennae attaining the middle of the thorax, 

 filiform, last joint slightly longer and very feebly obliquely truncate. Thorax 

 as long as wide or nearly so, feebly narrowed in front, sides feebly, base more 

 broadly arcuate, surface smooth and shining, three discal punctures anteriorly, 

 no lateral series, marginal punctures finer and distant. Scutellum sparsely 

 punctulate. Elytra as wide as the thorax, conjointly a little longer than 

 wide, surface shining, very regularly punctured but neither very coarsely nor 

 densely, sparsely pubescent. Abdomen more finely and less densely punctured, 

 sparsely pubescent, beneath more coarsely punctured than above. Femora 

 sparsely punctate, posterior tibiae spinulose externally. Length .24 — .30 inch; 

 6 — 7.5 mm. 



The sixth ventral of the male is feebly emarginate. The anterior 

 tarsi are dilated in both sexes but less in the female. 



The color of this species is usually piceous, with the margin of the 

 thorax, the elytra and the apices of the abdominal segments paler. 

 It may however be entirely piceous. The punctuation of the elytra 

 and abdomen shows some variation and may be denser than de- 

 scribed above. 



The post coxal process is moderately long and translucent. 



This species resembles siiblimbafAts, but this latter has the scutellum 

 smooth and the elytra more coarsely and deeply punctured. 



Occurs in California, Gilroy and Crystal Springs (Crotch), Mari- 

 posa, (Thevenet). 



Q. lievigatus Gyll. (Staph.) Ins. Suecc. ii, 306; Erichs. Staph, p. 529; 

 plagiatus Mann. Bull. Mosc. 1843, ii, p. 231; longipennis Mann. loc. cit. 1846, 

 ii, p. 509; rufipennis MakK Bull. Mosc. 1853, iii, p. 109. — Head broadly oval. 



