June, 189s.] 
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 but deep, rather close-set; elytra oblong, very broadly, ob- 
use y rounded at apex, one-fourth longer than wide, two and one-half times as 
ong as the prothorax, and, at apical third or fourth, visiLly 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. 
. Thls genus > which is also represented at present by a single species 
! S . remarka bly 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 cylmdric-oval, strongly convex, piceous-brown, shining, the legs and antennal 
shaft rufous ; vest.ture 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, the basal angles rather broadly rounded, the apical obtusely 
subprominent; lateral margin narrowly reflexed ; base finely margined; apex 
roadly rounded, slightly produced over the head ; punctures coarse, perforate 
and close set; elytra one-third longer than wide, twice as long as the prothorax 
an 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 1 0-1 1 
mm. California (Mokelumne Hill, Calaveras Co.) .cribrum, sp. nov. 
Ennearthron Mellie. 
The small cylindrical species which compose this genus may be 
readily identified by the characters given in the table. The antennte 
ire 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 
non 1 I 1 form. Prosternum moderately developed before the coxae, with 
