210 CALIFORNIA ACADEMY OF SCIENCES. [54] 



kind; eyes large, at twice their length from the base, finely granulate; sur- 

 face moderately convex, rather sparsely, unevenly and not deeply punctate; 

 punctures varying in size; antennal tuberculations abrupt, small and strong, 

 with the anterior edges acute and prominent; surface between them grad- 

 ually and anteriorly declivous, transversely truncate at apex; labrum short 

 and broad, acutely incised in the middle, finely, acuteby and prominently 

 bidenticulate, edge just without each tooth finely sinuate; fourth joint of the 

 maxillary palpi small, much narrower than the apex of the third, conical, 

 acute; antenna? long and slender, as long as the head and prothorax together, 

 not iucrassate; second joint distinctly shorter than the third, all the joiuts 

 longer than wide. Prothorax nearly three-fourths as wide as the head; sides 

 parallel, distinctly and almost evenly arcuate; base and apex almost equal in 

 width, truncate; basal aud apical angles equally and rather broadly rounded; 

 disk cyliudrically convex, one-half longer than wide, coarsely, feebly and 

 irregularly punctate; punctures sparse near the sides, more dense in an 

 irregular line borderiug the median impunctate area, which is very slightly 

 more strougly convex throughout its length. Elytra at base one-third wider 

 than the prothorax, slightly wider than the head; sides nearly parallel, 

 extremely feebly arcuate; together broadly and very feebly emarginate 

 behind ; humeri very narrowly rounded ; disk two-fifths longer than wide, 

 nearly one-third longer than the prothorax, depressed, very feebly impressed 

 toward base along the narrowly elevated suture, rather coarsely, feebly and 

 evenly punctate; punctures impressed, distant by more than their own 

 diameters, not appreciably more feeble toward apex. Abdomen slightly 

 narrower than the elytra; sides parallel and straight; surface finely, more 

 deeply, evenly and not densely punctate. Length 4.8-5.2 mm. 



California; (Santa Rosa, Sonoma Co. 2; Anderson Val. , 

 Mendocino Co. 1) 



In the male the second ventral segment has in the centre 

 of its disk a small deep fovea bearing a small brush of erect 

 hairs, the third segment having two similar fovea?, rather 

 approximate, arranged transversely, distinctly before the 

 middle, each bearing one or two erect robust setae; sixth 

 segment with a very narrow deep incisure, with the sides 

 nearly parallel, very acutely rounded at apex and five times 

 as deep as its mid-width, bordered throughout its length 

 with a narrow, deeply concave gutter which is prolonged 

 anteriorly, continuing thence as a single groove to the base 

 of the segment, becoming gradually attenuated. 



The prothorax is very slightly narrowed toward apex, the 

 basal angles thus being more prominent than the apical. 



