188 CALIFORNIA ACADEMY OF SCIENCES. 



sides more broadly impressed; apex broadly angulate; antennae as long as 

 the head and prothorax together; basal joint rather small, longer than wide; 

 second slightly smaller, cylindrical, slightly longer than wide; third small, 

 scarcely as long as wide, obconical; fourth as wide as the second, very 

 strongly transverse; fifth strongly inflated, transversely ov^l, more than twice 

 as wide as long; sixth slightly more strongly dilated; longer, transversely 

 ovoidal, slightly more acute inwardly; seventh widest, shorter than the pre- 

 ceding, apex truncate, very strongly transverse, more acute inwardly, more 

 than three times as wide as long; eighth slightly longer than the seventh, 

 one-half wider than long, obliquely truncate inwardly; ninth very small, 

 slightly wider than long; tenth slightly wider than long, distinctly wider 

 than the ninth; eleventh rather slender, pointed, as long as the three preced- 

 ing together, distinctly wider than the tenth. Prothorax widest very slightly 

 in advance of the middle, where it is slightly wider than long, very slightly 

 wider than the head; sides strongly arcuate, feebly sinuate before the basal 

 angles; disk strongly convex, very minutely punctate; lateral fovese very 

 large, rather deep; surface near the base slightly impressed and coarsely 

 punctate toward the sides; median puncture elongated longitudinally. Elytra 

 at base much wider than the prothorax, at apex more than twice as wide as 

 the [latter; sides strongly and evenly arcuate; truncate behind; disk rather 

 strongly and evenly convex, excessively minutely, rather sparsely punctate, 

 one-fourth wider thaii long, two-thirds longer than the prothorax; sutural 

 stride strong, nearly straight; discal very fine, rather feeble, terminating at 

 one-fifth the length from the apex. First ventral segment much shorter than 

 the next two together; carinae very fine, two-fifths as long as the segment, 

 distinctly divergent, distant by one-third the total width; carina near the 

 lateral border nearly as long as the entire segment; lateral basal foveas dis- 

 tinct. Legs rather long, very slender; posterior tibiae very slender, distinctly 

 arcuate and clavate, scarcely at all flattened. Length 1.2 mm. 



California; (Santa Cruz and Santa Clara Cos.) 

 Described from the male in which the terminal dorsal 

 segment is narrowly and very feebly emarginate at apex, 

 the emargination much narrower than in himorosa, evenly 

 rounded, about eight times as wide as deep; ventral seg- 

 ments not impressed. In the female the antennae are 

 slightly shorter than in the male, normal, club robust. 



Very abundant throughout the region indicated. It be- 

 longs near alhionica (Mots.), but differs according to the 

 description given by Dr. LeConte in the structure of the 

 male antennae, and more especially in that of the posterior 

 tibiae which are not perceptibly flattened. The antenna 



