188 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. 65- 



spicuous, recumbent, cinereous hairs; intervals finely and very 

 densely granulose. Scutellum triangular, feebly rounded in fronty 

 with the surface obsoletely granulose. Elytra moderately convex, 

 strongly flattened on top, distinctly wider than pronotum at base; 

 humeral angles obtusely angulated ; sides strongly arcuately concave 

 from the humeral angles to the middle, where they are broadly 

 rounded and slightly wider than at base, then rather strongly, ob- 

 liquely attenuate to the tips, which are conjointly broadly rounded, 

 and obsoletely serrulate ; humeri well developed ; each elytron with a 

 deep, rather broad basal depression and without a lateral carina; 

 surface with distinct rows of punctures, which are large and rather 

 deep at the base, but gradually becoming smaller toward the apex, 

 where they are nearly obsolete, sparsely clothed with a few very 

 short, inconspicuous cinereous hairs, which tend to form longitudinal 

 rows, and are only noticeable on the opaque area ; intervals finely and 

 densely granulose, except for a transverse area at apical third, where 

 the surface is more shining, the apical two-thirds so densely granu- 

 lose that the surface is strongly opaque. Abdomen beneath strongly 

 convex, sparsely and rather coarsely punctate, the punctures shallow, 

 oblong, and open on the one side, each puncture bearing a very short 

 recumbent cinereous hair ; intervals densely and obsoletely reticulate ; 

 last segment broadly rounded at apex, with the apical groove more 

 acutely rounded than apex, and extending to the lateral margins. 

 Prosternum finely and densely rugose. Front and middle tibiae 

 strongly arcuate. 



Length, 3.5 mm. ; width, 1.4 mm. 



Type locality. — El Yunque, Porto Rico. 



Type.— C?it. No. 26818, U.S.N.M. 



Described from a single male example received from G. N. Wolcott 

 of the Porto Rico Experiment Station and which was collected at 

 El Yunque, Porto Rico, by R. T. Cotton, March 23, 1917. El Yunque 

 is a mountain 3,790 feet high, in the northeastern part of the island, 

 between Mameyes and Fajardo. 



TAPHROCERUS AENEOCOLLIS, new species 



Form elongate, subcylindrical, strongly attenuate posteriorly, mod- 

 erately convex above, and feebly shining; head and pronotum dark 

 olivaceo-aeneous ; elytra piceous, without pubescent spots; beneath 

 piceous, with a feeble aeneous tinge. 



Head slightly narrower than pronotum at base, and when viewed 

 from above is transversely truncate, with a longitudinal groove 

 extending from the occiput to a somewhat flattened transverse area 

 in front of epistoma, the groove obsolete on the occiput, but becoming 

 more broadly and deeply impressed on the front, which is wide, with 



