166 Journal New York Entomological Society. [Voi. xxv. 



trees or stumps have made dams in which there is an accumulation 

 of dead leaves, etc., and upon surface of water a considerable col- 

 lection of scum and rubbish. 



Schzvarzi is obviously allied to undatus Aube, which is however a 

 little less attenuate, less shining, with distinctly reticulated surface, 

 more obscure and somewhat different elytral markings, prothorax and 

 under side entirely pale, antennae with terminal joint infuscate. 



I have been pleased to use for both this and the preceding species 

 the appropriate MS. names given them by the late Mr. C. H. Roberts 

 "and by which it is likely they are known in certain collections. 



BIDESSUS. 



Bidessus quadripustulatus new species. 



Broadly ovate, very convex, pointed behind; surface above polished and 

 strongly shining (except the head) ; pubescence exceedingly short and sparse; 

 above black, prothorax anteriorly yellow except in about the middle third ; 

 elytra each with two yellow spots, one subbasal, transverse, extending from 

 side margin two thirds the distance to suture; the other subapical, oblique, 

 oval. Antennae piceous, basal three or four joints pale. Head alutaceous, 

 finely sparsely punctate, finely margined in front. Prothorax more coarsely 

 and closely punctate, the punctures gradually coarser toward the base ; elytra 

 still more coarsely punctate, the punctures separated, as a rule, by less than 

 their own diameters ; equally close but decreasing somewhat in size toward 

 the sides and apex ; sides of prothorax and elytra not quite continuous, the re- 

 entrant angle, however, very broad and feeble, the former arcuate in front and 

 strongly diverging posteriorly ; elytra widest at about basal third, sutural stria 

 entirely wanting. Body beneath piceous or rufopiceous ; metasternum, coxa! 

 plates and abdomen basally, coarsely numerously punctate. Legs rufotesta- 

 ceous, the tibiae and tarsi usually darker. Length 2 to 2.2 mm.; width 1.15 

 to 1.25 mm. 



California. San Bernardino Mts., July 12-13; five examples 

 taken by the writer; sexes not certainly distinguishable. 



This species is allied closely to pictodes Sharp, but is distinctly 

 stouter and a little more convex than the latter, and the elytral spots 

 are never so large. The basal thoracic and elytral striae are similarly 

 discontinuous, perhaps a trifle more so in the present species, while 

 the elytral portion of the stria is here barely or scarcely as long as 

 the thoracic portion, while in pictodes it is fully as long as the thoracic 

 portion. The punctuation both above and beneath is observably 

 coarser in quadripustulatus, and the sutural stria seems constantly 

 lacking. In pictodes the sutural stria is traceable though faint. 



