474 CALIFORNIA ACADEMY OF SCIENCES. 



mants polishecl, impunctate; pub33G?u?e fi:ie, sliort, sparse. Heal smal', 

 as loag as wide, distinctly nirro.ver thaa the prothorax; eyis rather siuall, 

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

 arcuate, not prominent; occiput feeb'y impressed in the middle; front hav- 

 ing two large spoagiose foveae on a line thro igh the posterior portions of the 

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

 subangulate impress 3d groove; antennae short, slender, scarcely one-half 

 longer thail the head, club 1 irge, elongate, two basal joints more robust, sub- 

 equal, slightly longer than w de, joiuts three to sevej moniliform, the latter 

 globular, eighth very slightly wider, a little wider than long, eig'it to ten 

 very gradually wider and more transver-^e, 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, nearlj'- 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 foveae large, 

 spongiose, deeply impressed; median posterior prolongation rather broadly 

 impressed; basal margin feebly impressed. Elytr.d 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; disoal feebly arcuate, parallel, vanishing very slightly behind the 

 middle, distinctly double at base. Abdomen distinctly shorter an I narrower 

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

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

 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 ^- sp.— Kather 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; geuae distinctly 

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

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

 either from the eye, connec.ed by an impressed angulate groove; antennae 

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

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



