T4 Coleoplerological Notices. 



longitudinal impression. Elytra quadrate, one-third wider and about three- 

 fourtlis longer than the prothorax, densely, very deeply and somewhat coarsely 

 punctate. Abdomen narrow, much narrower than the elytra ; sides straight 

 and parallel ; surface extremely minutely and sparsely punctate. 



Male. — Sixth ventral segment with a very large median area, which is 

 flattened and finely densely pubescent ; seventli broadly, feebly emarginate 

 throughout the widtli at apex, the middle of the emargiuatiou feebly produced 

 in a short rounded process. 



Female. — Sixth segment not densely pubescent ; seventh not emarginate, 

 longer, the middle of the apex produced in a rather long process — about twice 

 as wide as long — which is strongly arcuate. 



Length 2.7-3.0 mm. 



California; Oregon; British Columbia. 



An extremely common species, easily separated from the next by 

 its relatively longer and wider elj'tra and many other characters. 



A. ceplialotes n. sp. — Rather slender, parallel, piceous-black; pronotum 

 rufous ; elytra paler, flavescent ; legs pale flavate ; antennae piceous-black 

 throughout ; integuments polished ; pubescence very short and sparse. Head 

 large, orbicular, slightly wider than long, as wide as the prothorax, feebly 

 convex ; transverse basal line finely, feebly impressed ; surface finely, feebly, 

 very sparsely punctate, with a sliort fine very feeble canaliculation in the 

 middle nearly attaining the transverse groove ; antennal prominences short, 

 rather wide and rather strongly elevated ; eyes very small, feebly convex, the 

 sid(!s behind them almost three times as long, strongly arcuate and much more 

 prominent ; antennae fully as long as tlie liead and prothorax together, feebly 

 incrassate, second and third joints subequal, tenth rather distinctly transverse. 

 Proilinrax nearly twice as wide as long ; sides more strongly arcuate anteriorly, 

 strongly convergent and feebly arcuate toward base, tlie latter broadly, dis- 

 tinctly arcuate, the basal angles very broadly rounded, apical acute, not at all 

 rounded, and slightly anteriorly prominent ; apex truncate ; disk not distinctly 

 impressed, not very coarsely or deeply, very sparsely and unevenly i)unctate, a 

 broad median line iinpunctate. Ehjtra quadrate witli the sides parallel, equal 

 in width to the prothorax and one-half longer, coarsely, very deeply and densely 

 punctate, a narrow line on each, near the suture rather deeply impressed. 

 Abdomen nearly as wide as the elytra ; sides parallel and very slightly arcuate ; 

 surface very minutely, sparsely punctate. 



Male. — Sixth ventral segment with a very large median area which is dis- 

 tinctly flattened, and covered very densely with fine erect pubescence ; seventh 

 broadly, fecljly emarginate throughout its width, the middle of the emargina- 

 tion not in the least produced ; eighth with a narrow elongate impression. 



Female. — Unknown. 



Length 3.0 mm. 



California (San Francisco). 



This is a remarkable species, its slightly transverse orbicular 



