576 Coleopterological Notices, VI. 



and nearl}' straight toward apex and base, the former arcuato- 

 truneate and narrower than the more arcuate base ; basal angles 

 obtuse but distinct and not rounded, the apical obtuse and 

 rounded; lateral edges finely serrulate ; disk polished and convex, 

 rainutel}' and remotely punctate, coarsely reto-rugose near the 

 sides. Elytra two-fifths longer than wide, at posterior third much 

 wider than at base and one-half wider than the prothorax with the 

 sides arcuate ; apex semi-circular; disk convex, finelj' and sparsely 

 punctate, the punctures becoming feeble toward apex. Length 

 2.3 mm.; width 1.1 mm. 



California. The single specimen, which I took in the coast 

 region north of San Francisco, is a female, and the fifth ventral 

 is broadly rounded and feebly impressed in the middle at the 

 apical margin; the genital segment is large, slightly deflexed, 

 broadly angulate at apex and is feebly impressed at the middle 

 of the disk. There can be scarcely any doubt at all that this is 

 the species of Motschulsky, as it agrees with his description in 

 every essential feature ; the species identified by LeConte under 

 the name hreviusculus, is however quite a different thing, Avhich 

 I am unable to place in the absence of the t^-pe, but which ma}- 

 possibly be the nifens described above. 



6. D. dissiiiiilis ii. sp. — Elongate, convex, polished, black with a feeble 

 greenisb-jeneous lustre; legs rufous, the femora black except at apex ; antennae 

 blackish, the second and some of the following joints less distinctly, pale; 

 pubescence suberect, moderately long, cinereous, rather sparse and even, a 

 few hairs toward the elytral sides and apex slightly longer than the others l)ut 

 not more erect. Head very nearly as wide as the prothorax, smooth and bur- 

 nished, minutely and remotely punctulate, the frontal impressions widely 

 separated, apical and pronounced; epistoma short, the labrum])roadly rovinded; 

 mandibles black; eyes prominent; antenna; slender, filifoi-m distinctly longer 

 than the head and prothorax, all the joints longer than wide, the eleventh 

 aboxit as long as the two preceding. Prothorax fully one-half wider than long; 

 sides rounded behind the middle, thence feebly convergent and somewhat sin- 

 uate to the apex, feebly convergent and nearly straight to the base, the basal 

 angles obtuse but distinct, the apical but slightly obtuse; apex and base sub- 

 equal; disk very obsoletely reticulate, polished, minutely and remotely punc- 

 tate, coarsely reto-rugose near the sides. Elytra fully three-tifths longer than 

 wide, but very slightly wider near ai)ical third than at base and about one- 

 half wider than the prothorax; sides feebly arcuate posteriorly, the apex 

 broadly parabolic, finely but distantly serrulate, the sutural angles not dis- 

 tinctly rounded; disk rather coarsely; subrugosely and sparsely punctate, the 

 interspaces polished. Under surface very sparsely pubescent. Length 2.5 mm. ; 

 width 1.0 luin. 



