12 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
densely punctate, the punctures large, very shallow and open on one 
side, becoming finer on the disk, densely clothed over entire surface 
with rather long, recumbent, cinereous hairs; intervals finely and 
densely granulated at the sides, the granulation becoming more 
obsolete on the disk. Scutellum smooth and glabrous, with the 
anterior angles acute. Elytra as wide as pronotum at base, widest 
at basal fourth; humeral angles obtuse; sides broadly rounded to 
middle, then arcuately attenuate to the tips, which are conjointly 
broadly rounded, the lateral margin being entire and when viewed 
from the side is broadly and deeply arcuate at the middle; surface 
with a broad, shallow depression at the base, a deeper one extending 
from the humeral angle obliquely backward to the middle, and con- 
nected to a narrow depression along the lateral margin extending to 
near the tip, causing a round gibbosity behind the middle, which is 
slightly closer to the lateral margin than to the suture, finely, densely 
punctate over entire surface, and rather densely clothed with short, 
recumbent, cinereous hairs, except a small lunate spot a short distance 
behind the scutellum (common to both elytron), where the pu- 
bescence is black; there is also an obsolete dark area extending 
obliquely backward from the humeri, and a broadly arcuate one at 
the apical third, caused by the cinereous pubescence being sparser 
and allowing the surface color to become more prominent. Abdomen 
beneath flat, sparsely and coarsely punctate, the punctures shallow 
and open on the one side, from each puncture arising a rather long, 
recumbent, cinereous hair; intervals finely and densely reticulate; 
last segment very broadly rounded at apex. Elytral epipleura broad 
and rather deeply concave. Metasternum more coarsely punctured 
than abdomen, and truncate in front. Prosternum short, very deeply 
emarginated for the insertion of the head; prosternal process rather 
narrow, about two times as wide as the coxal cavities, sides nearly 
parallel, and the apex broadly rounded; prothoracic episternum 
parallel, long, very narrow, and deeply concave. Prothoracic epi- 
pleura very wide, and moderately concave; antennal grooves deep, 
nearly transverse, and reaching to the lateral margin slightly in 
front of the middle; lateral margin acute. 
Female.—Differs from the male in having the head and pronotum 
entirely dark cupreous, and the last abdominal segment very broadly 
rounded, almost truncate, with the angles broadly rounded, and fur- 
nished with about 26 short, blunt teeth, one or two at the extremities 
of the series being smaller and not so well defined as the others, the 
portion in front of the marginal groove with a row of large teeth at 
the tip, and a transverse series of very long yellowish hairs at middle 
of segment. 
Length, 3.2 mm.; width, 3 mm. 
Type locality.— Paraiso, Canal Zone, Panama. 
