474 CALIFORNIA ACADEMY OF SCIENCES. 



merits polished, impunctate; pubescence fine, short, sparse. Head smal', 

 as long as wide, distinctly narrower than the prothorax; eyes rather small, 

 at the middle of the sides, convex; genas distinctly longer than the eyes, 

 arcuate, not prominent; occiput feebly impressed in the middle; front hav- 

 ing two large spongiose foveas on a line through the posterior portions of the 

 eyes and mutually twice as distant as either from the eye, connected by a 

 subangulate impressed groove; antennae short, slender, scarcely one-half 

 longer than the head, club large, elongate, two basal joints more robust, sub- 

 equal, slightly longer than wide, joints three to seven moniliform, the latter 

 globular, eighth very slightly wider, a little wider than long, eight to ten 

 very gradually wider and more transverse, equal in length, the latter oval 

 and scarcely twice as wide as long, eleventh nearly twice as wide as the 

 tenth, cylindro-conoidal, acuminate, truncate at base, elongate, nearly as 

 long as the five preceding together. Prothorax, widest at two-fifths the 

 length from the apex; sides rather strongly rounded, distinctly convergent 

 and feebly sinuate to the basal angles; base feebly arcuate, scarcely more 

 than two-thirds as wide as the disk, one-third wider than the apex; disk 

 convex, about as wide as long, crossed at one-third the length from the base 

 by a narrow impressed groove which is nearly straight; lateral foveas large, 

 spongiose, deeply impressed; median posterior prolongation rather broadly 

 impressed; basal margin feebly impressed. Elytral width at the humeri, 

 which are distinctly prominent, much greater than that of the prothorax; 

 sides very feebly divergent, evenly and strongly arcuate; together as long 

 as wide, transversely truncate at apex; disk feebly convex, each trifoveate at 

 base; sutural striae deep, feebly and evenly arcuate, rather distant from the 

 suture; discal feebly arcuate, parallel, vanishing very slightly behind the 

 middle, distinctly double at base. Abdomen distinctly shorter and narrower 

 than the elytra; sides parallel and straight at base, rounded behind; border 

 rather narrow; first visible dorsal with two fine subparallel basal carinas 

 which are nearly one-third as long as the segment and separated by nearly 

 one-fourth the abdominal width. Legs slender. Length 1.3 mm. 



California (Mendocino Co. 1). 



Easily known by its dark abdomen, slender antennae and 

 smaller eyes. 



A. robustulum n. sp. — Rather robust, convex, pale testaceous through- 

 out; integuments polished, impunctate; pubescence fine, short, subrecum- 

 bent, not dense. Head very small, nearly as wide as long, much narrower 

 than the prothorax ; eyes moderate, convex, prominent; genas distinctly 

 longer than the eye, not prominent, rounded; occipital foveas large, on a 

 line through the posterior portions of the eyes, mutually twice as distant as 

 either from the eye, connected by an impressed angulate groove; antennas 

 short and slender, scarcely one-half longer than the head, club gradual, 

 elongate, two basal joints subequal, slightly more robust, longer than wide, 



