574 ColeojJterological Notices, VI. 



middle than at base, the apex very obtusely parabolic, the edge not at all 

 serrulate; disk finely, sparsely and but slightly rugosely punctate, the inter- 

 spaces smooth and polished. Under surface clothed sparsely with short cine- 

 reous hairs. Length 3.0 mm. ; width 1.4 mm. 



Colorado. 



The male serving as the type has the fifth ventral short and 

 ver^^ broadl}' sinuato-triincate, the genital segment short, flat, 

 apparently not at all canaliculate along the middle and feebl^'^ 

 sinuato-truncate at tip ; the dorsal pygidium has the lower edge 

 thin and not dilated into a flat plate as in Trichochrous. The 

 ungual appendages are short and basal. 



3. D. expausus n. sp. — Stout, subcuneiforni and depressed, polished, 

 black, with a feeble coppery lustre anteriorly; legs black, the tarsi picescent, 

 the apex of the femora and base of the tibi?e slightly rufescent; antennae black 

 throughout; pubescence rather short and sparse, semi-erect, cinereous but be- 

 coming blackish behind the middle of the elytra, mingled with short erect 

 and blackish setiB especially toward the sides of the body. Read fully three- 

 fourths as wide as the prothorax, slightly transverse, strongly and closely 

 punctate, the punctures slightly elongate, the interspaces smooth and polished; 

 front feebly and remotely biinipressed, the frontal margin broadly smooth 

 and slightly convex; epistoma rather long, the labrum not deflexed, broadly 

 arcuato-truncate at apex; eyes rather prominent; antenna? slender and filiform, 

 the penultimate joints fully as long as wide. ProtJiorax widest at basal two- 

 fifths where the sides are broadly rounded, thence becoming convergent and 

 just visibly' arcuate to apex and base, the former arcuato-trirncate and slightly 

 narrower than the base, which is more arcuate; basal angles obtuse but not 

 rounded and minutelj- prominent; apical angles obtuse and blunt; edges finely 

 subserrulate ; disk smooth and polished, strongly convex, finely but strongly 

 and rather closely punctate, strongly rugose near the sides. Elytra short, 

 scarcely more than one-third longer than wide, at apical third much wider 

 than at base and nearly one-half Avider than the prothorax; sides arcuate, the 

 apex obtuse and broadly rounded, the sutural angles rounded ; disk nearly flat, 

 rather coarsely and closely piinctate, the interspaces strongly shining. Under 

 surface very feebly convex and sparsely pubescent. Length 2.6 mm.; width 

 1.3 mm. 



California (north of San Francisco). 



The unique type is apparanth^ a female, but the species may be 

 readily known b^- its depressed, cuneate form and b}^ the charac- 

 teristics of vestiture detailed in the description. It differs from 

 breviusculus in its dense pronotal punctures and in the coloration 

 of the antenna? and legs. 



■'o^ 



4. D. Iliteiis n. sp. — Subcuneiform, strongly convex, polished, deep 

 black with a faint greeni.sh-metallic lustre; legs and antenuie deep black 



