540 Golcopterological Notices, VI. 



character, of which it is impossible at present to state the sig- 

 nificance. 



1. A. laciiiiatiis n. sp. — Narrow, parallel and rather convex, polished, 

 black, the head and pronotuni w itli a dark hluish-metallic lustre, the elytra 

 slifihtly piceous; femora hlack, the tihiie and tarsi rufo-piceous; antenn:e 

 black, Avith the second joint testaceous; pubescence rather long but sparse 

 and semi-erect, blackish anteriorly, cinereous toward the sides of the prono- 

 tuni, the marginal cilia of this part well developed, dense even and black, 

 l)r()wnish-black on the elytra, with a few cinereous hairs scattered along the 

 sutine and on the flanks, the marginal cilia rather sparse and pale, the upper 

 surface devoid of long erect setre. Head fully three-fourths as wide as the 

 prothorax, nearly smooth, finely and sparsely punctate, the entire front be- 

 tween the eyes to the anterior margin broadly concave, the bottom of the con- 

 cavity feebly convex in the middle anteriorly, epistoma short and transverse; 

 labrum small, transverse, jiale, broadly rounded; mandibles pale in the mid- 

 dle; eyes large and prominent, not (^uite attaining the base; antennic about 

 one-third longer than the prothorax, feebly incrassate, the outer joints but 

 slightly transverse and scarcely asymmetric. Prothorax- transversely elliptical, 

 three-fourths wider than long, parallel and strongly, evenly rounded at the 

 sides; all the angles broadly rounded; apex and base very slightly arcuate, 

 the former just visibly the narrower; disk finely, sparsely punctate, coarsely 

 but feebly reto-rugose toward the sides. Elytra nearly two-thirds longer than 

 wide, equal in width to the prothorax, parallel and straight at the sides, 

 evenly and not obtusely rounded at apex, the sutural angles slightly blunt; 

 l>unctures coarse and not very close-set, much finer toward tip. Under surface 

 thinly cinereo-pubescent. Length '2.1 mm. ; width U.9 mm. 



♦ 



California (San Diego). Mr. Dunn. 



The unique uiale type has the fifth ventral truncate at apex and 

 somewhat impressed on the disk from side to side in a posteriorly 

 arcuate area; the inner spur of the anterior and middle tibijt is 

 dilated, with the tip obtuse but acutely pointed at the middle of 

 the apex. 



LISTRrS :Motsch. 



The genus Listrus, as here considered, is an extensive and very 

 homogeneous aggregate, characterized by an elongate and sub- 

 parallel convex body, generally sparse and variegated vestiture 

 without intermixed set;^, slender tarsi in both sexes, with the 

 basal joint of the posterior slightly longer than the second, the 

 fifth somewhat dilated toward tip and canaliculate above at apex 

 as usual throughout the family, the anterior tibi;e slender, cylin- 

 drical, usually with closely decumbent ashy pubescence and only 



