June, is 9 s.] Casey: North American Coleoptera. 87 



angles rounded, the sides strongly convergent and broadly arcuate from base to 

 apex, the latter broadly subparabolic, not extending much over the head ; punc- 

 tures not very coarse bnt deep, rather close-set ; elvtra oblong, veiy broadly, ob- 

 tusely rounded at apex, one- fourth longer than wide, two and one-half times as 

 loDg as the prothorax, and, at apical third or fouitb, visibly wider ; sides nearly 

 straight; punctures rather coarse, deep and somewhat close set, the surface 

 nearly smooth. Length 1.4 mm.; width 0.75 mm. New York (Ithaca) 



brevicollis, sp. nov. 



Plesiocis, gen. nov. 

 This genus, which is also represented at present by a single species, 

 is remarkably distinct in the structure of the antennae, which are 9- 

 jointed, with the club large and well developed, more corneous than 

 usual, dark in color and with the two sensitive subapical pores on each 

 side large, rounded and filled with white spongy pubescence ; the club 

 is nearly as long as the entire basal portion, with its first two joints 

 transverse and obtriangular. The maxillary palpi are well developed, 

 but rather Slender, the prosternum normal, the process however rather 

 thin and sublamellar. The anterior tibiae are strongly, obliquely pro- 

 duced and acute externally at apex. The male has very simple charac- 

 ters, the clypeus having two minute and rather approximate tubercles, 

 but the first ventral segment has, as in so many other cases, a small pubes- 

 cent fovea at the centre of the disk. The type resembles a large sub- 

 cylindrical Cis : — 



Body cjlindric-oval, strongly convex, piceous-brown, shining, the legs and antennal 

 shaft rufous ; vestiture rather sparse, the hairs coarse, pale, stiff and erect, mod- 

 erate in length ; head rather small, the eyes moderate, convex ; front flat, finely 

 punctate ; prothorax two-fifths wider than long, the sides feebly convergent and 

 slightly arcuate, ihe basal angles rather broadly rounded, the apical obtusely 

 subprominent ; lateral margin narrowly reflexed ; base finely margined ; apex 

 broadly rounded, slightly produced over the head ; punctures coarse, perforate 

 and close set ; elytra one third longer than wide', twice as long as the prothorax 

 and scarcely at all wider, the sides nearly straight, the apex very broadly and 

 obtusely rounded; punctures coarse, perforate, close-set and arranged evenly 

 but without order, the interspaces smooth. Length 2.1-2.3 mm ; width I 0-1 l 

 mm. California (Mokelumne Hill, Calaveras Lo. ) cribrum, sp. nov. 



Ennearthron Mellic. 



The small cylindrical species which compose this genus may be 

 readily identified by the characters given in the table. The antenna? 

 are slender, with the club rather feeble, the first joint of the funicle 

 generally equal to the next two, which, with the last are equal and 

 moniliform. Prosternum moderately developed before the coxae, with 



