NORTH AMEKICAN COLEOPTERA. O.") 



A. ii^cabriceps Lee. — Moderately elongate, somewliat l)roader behind, ('on- 

 vex, brownish, elytra yellow with the suture narrowly darker. Antennaj pale 

 rufo-testaeeous. Head convex, dark brown behind the frontal suture, testaceous 

 brown anteriorly, front not distinctly tuberculate, very coarsely, deeply and 

 rather closely punctate, almost cribrate. Clypeus hemihexagonal, a feebly ele- 

 vated transverse carina, anterior margin rather deeply emarginate, the angles on 

 each side rounde'd, sides arcuate and slightly sinuate, gense very feebly promi- 

 nent and obtuse. Thorax scarcely narrowed in front, the sides slightly arcuate 

 and sparsely fimbriate, hind angles distinct, but obtuse ; base arcuate, with dis- 

 tinct marginal line, surface with moderate punctures, regularly, but not closely 

 l>laced, less dense toward the sides; color brown, the sides indefinitely i)aler. 

 Elytra a little wider than the thorax, humeri obtuse, slightly wider behind the 

 nuddle, disc striate, the punctures moderately close and coarse, the intervals con- 

 vex, each with a row of distant finer punctures. Body beneath coarsely, but 

 sparsely punctate, the abdomen alutaceous or sparsely pubescent. Legs rufo- 

 testaceous, posterior femora smooth, with a short row of coarse punctures near 

 the knee, first .joint of hind tarsus a little longer than the next two. Mesoster- 

 num not carinate, smooth at middle, alutaceous each side. Length .12-. 14 inch ; 

 3.-3.5 mm. 



In the four specimens before me I have not observed any sexual 

 differences. 



A very ])retty little species by its pale yellow elytra and the bi- 

 colored head. It resembles rugiceps in the rough sculpture of the 

 head, but the spinules of the tibite are unequal and closely placed, 

 but are less unequal in length than is usual in the series. 



Occurs in Colorado. 



A. nanus n. sp. — Oblong, parallel, brownish, elytra paler, bi'owuish testa- 

 ceous. AntennfE pale rufo-testaceous. Head convex, coarsely punctured and 

 wrinkled, front without distinct tubercles. Clypeus hemihexagonal, impressed 

 in front and deeply eniarginate, the angles rounded, the sides ai'cuate, a distinct 

 transverse carina, gente slightly prominent above. Thorax convex, the sides 

 nearly pai-allel, slightly arcuate, sparsely fimbriate, hind angles well defined, but 

 ol)tuse, base arcuate, with distinct marginal line, disc rather coarsely, but sparsely 

 punctured, the punctures gradually finer and sparser near the side, the sides of 

 thorax usually paler. Elytra as wide at base as the thorax, humeri obtuse, 

 sides parallel, disc rather deeply striate, the punctures moderately coarse and 

 close, the intervals convex with a row of distant irregular punctures. Body 

 beneath very sparsely punctate, abdomen very sparsely pubescent. Posterior 

 femora smooth, first joint of hind tarsus a little larger than the next two. Me- 

 sosternum not carinate, opaque in front witii a narrow median smooth space. 

 Length .10-. 14 inch ; 2.5-3.5 mm. 



No sexual differences have been observed in the seven specimens 

 examined. 



This species is closely related to scabriceps, but the head is uniformly 

 colored, the thorax more coarsely punctured, the spinules of the hind 

 tibine nnich longer and less close, and the clyi^eus more deeply emar- 

 ginate. 



Occurs at Carrizo Springs, Texas (Schaupp). 



