82 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
vertex, with a narrow, obsolete, longitudinal groove extending from 
the epistoma to a small, obscure fovea on the front; surface coarsely, 
irregularly, and sparsely punctate; intervals smooth; antennae 
rather short and entirely piceous. Pronotum moderately convex, 
three times as wide as long, distinctly narrower in front than behind, 
widest near the base; sides nearly parallel to basal fourth, then 
strongly, arcuately attenuate to anterior angles; posterior angles 
rectangular; anterior margin broadly, arcuately emarginate; base 
transversely truncate to near middle of elytron, then feebly sinuate 
and turning obliquely backward to the scutellum, in front of which 
it is subtruncate; surface broadly and rather deeply depressed at the 
sides, the depression becoming gradually broader posteriorly and 
extending internally to the elytral lobe, sparsely and rather coarsely 
punctate, the punctures round and deep on the disk and stelliform 
in the depressions; intervals smooth on the disk, but becoming finely 
reticulate-striolate at the sides. Scutellum smooth and broadly tri- 
angular. Elytra moderately convex, as wide as pronotum at base, 
widest at about basal third; humeral angles rather obtusely angu- 
lated; sides feebly expanding to basal third, then strongly, arcuately 
attenuate to the tips, which are conjointly narrowly rounded, the lat- 
eral margins entire; humeri moderately developed; each elytron with 
a broad, deep depression at the base, and a narrow one between the 
humerus and lateral margin extending along the margin from the 
humeral angle to the middle and becoming much broader behind the 
humerus; surface feebly wrinkled at sides and humeral regions, 
coarsely, irregularly, and rather densely punctate; intervals entirely 
smooth. Abdomen beneath finely and obsoletely punctate, with a 
few inconspicuous hairs; intervals finely and densely reticulate- 
striolate, with a few long, widely separated rugae on the first seg- 
ment; last segment broadly rounded at apex. Prosternum nearly 
smooth, with a few widely separated punctures; anterior margin 
feebly, arcuately emarginate. Metasternum sparsely and coarsely 
punctate; intervals snfooth on anterior part, but becoming densely 
and finely reticulate-striolate on balance of surface. 
Length, 2.75 mm.; width, 1.6 mm. 
Type locality.— Paraiso, Canal Zone, Panama. 
Other localities.—Porto Bello, Panama. 
Type and paratype.—Cat. No. 25127, U.S.N.M. 
Described from two specimens. The type was collected by E. A. 
Schwarz April 29, 1911, and the paratype by the same collector 
March 10, 1911. 
This species is allied to crassa Waterhouse, but it does not have 
the pronotum transversely impressed at the base, and the posterior 
angles are rectangular, and not acute and directed backward as in 
crassa. 
