Schwarz.] 360 [Feb. 1, 
11. Nemicelus marginipennis Lec.—The two sexes differ from 
each other most remarkably and might be easily mistaken for two distinct 
species. The form described by LeConte (Proc. Ac. Nat. Sc. 1854, p.79), 
I take to be the ¢’. The female differs chiefly by the following characters : 
Less elongate, opaque above, color of upper and underside darker. Head 
densely rugosely punctulate with an obtuse tooth behind the eyes, eyes 
smaller, less elongate and less oblique, more convex ; antenne with the 
first joint only one-half longer than wide, shorter than the two following to- 
gether. Thorax hardly longer than wide anteriorly, more dilated in front, 
not emarginate at apex, apical edge thickened, base much less lobed in 
the middle, surface densely rugosely punctulate. Elytra almost entirely 
covering the abdomen, less truncate at apex, distinctly pubescent, densely 
punctulate, strive less evident. Prosternum shining, punctate, process be- 
tween the front coxe hardly visible, propleure opaque, sculptured as the 
thorax; mesosternum much smaller, less broadly rounded in front, dilated 
behind, shining punctate; metasternum and abdomen opaque, the latter 
less elongate, last segment not longer than the preceding with a large shal- 
low impression. Hind tarsi 4-jointed as in the male. 
The genus Nemicelus was first described by Dr. LeConte, 
and is certainly distinct from Hemipeplus. 
12. Nemicelus microphthalimus, 2 n.sp.—Linear, pale, yellow- 
testaceous. Head quadrate, subconvex, behind the eyes straight, then 
suddenly narrowed and forming a short neck, somewhat shining, sparsely 
and obsoletely rugose ; eyes small, round, convex, very coarsely granula- 
ted, mandibles deeply emarginate and black at tip; antenne a little longer 
than head and thorax, first joint stout one-half longer than wide, shorter 
than the two following together, joint 2 globular, the following 4 joints as 
long as wide, equal, 7 and 8 a little larger than the preceding, the three 
last joints abruptly larger, 9 and 10 hardly transverse, terminal joint oval 
acuminate. Thorax but little longer than wide anteriorly, feebly and 
broadly emarginate in front, sides oblique, convergent towards the base, 
subsinuate anteriorly and broadly sinuate before the hind angles ; base al- 
most straight, not lobed, apical edge thickened, anterior angles obtuse; 
rounded at tip, posterior angles obtuse ; surface somewhat shining, indis- 
tinctly, rugosely punctulate with a faint trace of an impressed median line, 
basal impressions large and deep. Scutellum opaque, subquadrate and a little 
broader behind, apical side rounded. Elytra almost covering the abdomen, 
subopaque, paler than the head and thorax, darker at the sides and with a 
short dark line on each elytron near the suture at the apical fourth, densely 
and equally rugosely punctulate with hardly any trace of striz. Pro- and 
mesosternum shining, sparsely punctulate, propleurse opaque, sculptured 
as the thorax, front coxze very narrowly separated, metasternum and abdo- 
men subopaque densely and finely punctulate, last ventral segment hardly 
longer than the preceding with a round impression, occupying nearly the 
whole surface. Length 3.25 mm. ; .18 inch. 
<\ Unknown to me, 
