40 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
sparsely punctate and densely granulated, the granulation much 
denser at the sides, clothed with a few short, very inconspicuous hairs. 
Scutellum finely, obsoletely punctate, and glabrous, the anterior 
angles acute. Elytra as wide as pronotum at base, slightly wider at 
at basal fourth; humeral angles obtusely rounded; sides feebly rounded 
to near the middle, then obliquely attenuate to the tips, which are 
conjointly, rather narrowly rounded, the lateral margin rather strongly 
serrate, and when viewed from the side is nearly straight, except for 
a slight sinuation for the insertion of the posterior femora; each 
elytron with rather deep, narrow depression between the humerus 
and elytral margin, extending along the margin from the humeral 
angles to a much broader depression behind the humerus, with only 
a trace of a basal depression; surface rather densely and coarsely 
punctate, the intervals nearly smooth on disk, becoming finely granu- 
lated and somewhat rugose at the sides and humeral region, and with 
a few very short, inconspicuous hairs. Abdomen beneath strongly 
convex, sparsely and obsoletely punctate, the punctures very shallow 
and open on the one side, sparsely clothed with short, inconspicuous, 
cinereous hairs; intervals finely and densely reticulate; last segment 
rather acutely rounded at the apex, with the margin flattened, the 
portion in front of the marginal groove acutely angulated, with 
the tip very acute. Elytral epipleura narrow. Metasternum more 
coarsely punctured than the abdomen, and rather deeply, rectan- 
gularly emarginate infront. Prosternum feebly, arcuately emarginate 
anteriorly; prosternal process about three times as wide as the 
coxal cavities, sides slightly expanded behind coxae, truncate at the 
apex with the angles broadly rounded; episternum short, flat, and 
triangular. Prothoracic epipleura wide and nearly flat, with a deep, 
narrow groove behind the antennal groove; lateral margin rectan- 
gular; antennal groove deep, following the suture between the 
episternum and epipleura, extending into the latter to the tibial 
groove and parallel to it. 
Female.—Differs from the male in having the head and pronotum 
of a uniform piceous color, with a slight aeneous reflection, and the 
last abdominal segment narrow and strongly produced at the apex, 
deeply, narrowly and arcuately emarginate at the middle, with a very 
strong tooth on each side of it, next to which is a less strong and 
slightly shorter tooth, and on the outside a very small acute tooth at 
a lower level; the ventral surface with a broad, obsolete median 
depression. 
Length, 2.25 mm.; width, 1.4 mm. 
Type locality Paraiso, Canal Zone, Panama. 
Other localities —Panama City, Panama. 
Type, allotype, and paratypes.—Cat. No. 25109, U.S.N.M. 
