586 Coleoptei'ological Notices, VI. 



slender blackish hairs of the same length. I am unable to observe 

 any sexual differences. 



5. I>. ruficollis Ulke— Geog. and Geol. Exp. and Surv., 4 to., Wheeler, 

 V, 1875, p. 812 (Dasytes). 



Stout, oval and strongly convex, polished, piceous, the head, 

 prothorax,and apex and flanks of the el3'tra pale flavo-testaceous ; 

 legs very pale throughout ; antennae blackish-piceous, pale testa- 

 ceous in about basal half; pubescence short, even, pale cinereous, 

 moderately dense and distinct, without trace of erect hairs. Head 

 very short and transverse, three-fourths as wide as the prothorax, 

 somewhat finely but strongly and rather closeh' punctate, the im- 

 pressions obsolete ; frontal margin transversely and feebly tumid 

 and impunctate; epistoma ver^' short and transverse, the labrum 

 very transverse, truncate; eyes small, convex, not quite attaining 

 the base ; antenni>? slender, as long as the head and prothorax, 

 filiform, the tenth joint fully as long as wide. Prothorax three- 

 fifths wider than long, the sides broadly arcuate toward base, 

 gradually somewhat convergent and very feebl v arcuate thence to 

 the apex, which is arcuato-truncate and much narrower than the 

 base, the latter feebly arcuate, the basal angles very obtuse and 

 scarcelj^ distinct ; disk evenly coua'cx, finely' but strongly, rather 

 closely and evenly punctate throughout, the lateral edges fine and 

 feebly serrulate, the fringe rather short but dense and distinct. 

 Elj'tra short, scarcely more than one-third longer than wide, 

 nearly one-half wider than the prothorax, the sides subparallel 

 and nearly straight, becoming rounded and convergent in apical 

 two-fifths, the apex obtuse ; punctures fine but strong and distinct 

 and well separated. Legs ver)- slender. Length 2.0 mm.; width 

 0.85 mm. 



Nevada. A distinct form, somewhat resembling a small halti- 

 cide at first glance. The specimen described above has the fifth 

 ventral truncate and is probably- a male ; it seems also to be 

 slightly immature. 



<i. I>. bicolor n. sp. — Oblong, sul)Oval, rather narrow and convex, highly 

 polished throughout, pale rufo-testaceous, the elj-tra and under surface of the 

 hind body black; head blackish toward base, the antennaj l)lack at apex, grad- 

 ually' testaceous toward base; palpi and legs pale throughout ; pubescence mod- 

 erate in length, sparse, fulvo-cinereous, blackisli on the elytra except toward 

 base near the sides and at apex. Head transverse, two-thirds as wide as the 

 prothorax, finely and sparsel\- punctate, the frontal impressions at the apical 



J 



