AMERICAN COLEOPTERA. 181 



1. 4. striatum Oliv.— Elongate, subcylindrical, brown, opaque, with rather 

 sparse short perfectly recumbent pubescence. Antennae 11-jointed, about half 

 the length of the body in the male, shorter in the female; third joint slightly 

 shorter than the two following united ; fourth to eighth small, subequal ; ninth 

 equal to the six preceding; ninth to eleventh longer than the entire remainder. 

 Head and prothorax simply finely punctate, the former with a prominent frontal 

 protuberance, the latter strongly elevated posteriorly and compressed, the front 

 declivity of the elevation lightly channeled, the sides obliquely impressed ; side 

 margins strong, nearly straight and a little convergent in front, just visibly sinu- 

 ate behind the front angles which are sharply defined, right or slightly acute ; 

 hind angles rounded. Elytra slightly wider than the prothorax, with feebly 

 impressed striae of approximate subquadrate punctures; the interspaces wider 

 than the striae, not distinctly punctured. Beneath dull, finely pubescent and 

 minutely punctate. Metasternum with a triangular glabrous fovea between the 

 anterior cavity and the hind margin. Ventral segments one, three and five 

 nearly equal,. the fourth just visibly shorter; the second longest; first suture 

 Insinuate, posteriorly arcuate at middle. Hind coxal plates narrow, nearly par- 

 allel, the hind margin almost straight. Fifth segment with a subapical trans- 

 verse fovea in the male, the segment nearly flat in the female. Length 2.7-4 mm. 



Very few native specimens of this species have been seen, the 

 material before me containing only single examples from Massachu- 

 setts (Blanchard), Da Costa, New Jersey (Boerner) and Rosslyn, 

 Virginia (Chittenden). 



II U>ROBRKGMI S Thomson. 



Elongate, subcylindrical ; pubescence fine, short and usually 

 sparse, perfectly recumbent. Antennae 10- or 11-jointed, stem not 

 serrate, three outer joints elongate, together longer than all the pre- 

 ceding. Prothorax slightly or distinctly narrower than the elytra, 

 moderately or strongly gibbous, sides narrowly margined (except 

 defectus), hind angles indistinct. Elytra feebly striate, with regu- 

 lar series of rather large punctures. Anterior and middle coxae 

 widely separated, the antennae received between them ; prosternal 

 process truncate behind ; metasternum not or scarcely excavated in 

 front; ventral segments free, varying in relative length in the differ- 

 ent species. 



Certain species, notably those at the beginning of the series (cari- 

 natus, etc.), resemble Olujomerus quite closely, but they are really 

 more nearly, indeed very nearly related to Anobium. The palpi 

 also show an approach in form to those of Anobium and Oelostethiis, 

 the terminal joint being more dilated apically with the tip obliquely 

 truncate or subtruncate. 



TEANS. AM. ENT. SOC. XXXI. JUNE, 1905. 



