The Pselaphid^ of North America. 289 



traceable to very near the posterior margin. Abdomen short, 

 the first segment not more than one-fourth as long as wide, 

 carinte very close together, about half as long as the segment 

 and divergent. The male has the elytral sculpture more 

 plainly marked. 



Habitat. New York, Iowa. 



Judging from the author's description, B. facilis, Casey, 

 may be identical with this species. 



B. RADIANS, Lcc. Ferruginous, im punctate, abdominal 

 lines long, ^ last two ventrals concave, with an elongate 

 medial elevation. Length, 1.5 mm. (Leconte's description). 



Sexual variations are found in the elytral punctuation; the 

 coloration is unstable; these facts, together with the vague 

 statement of the carina? being long, lead us to regard it as a 

 doubtful species. 



B. ATLANTiCA, Breudcl. Robust, elongate, impunctate, 

 polished, very thinly pubescent, deep honey-yellow ferrugi- 

 nous throughout; occipital impressed in the middle. Length, 

 1.5 mm. 



Head comparatively smaller than in B. rubiciinda, narrower 

 in front of the eyes than behind them, occiput triangularly 

 impressed in the middle, antennal tubercles small, prominent, 

 space between them narrow, very concave, fovete as usual. 

 AntcnncB shorter than the head and prothorax, rather robust, 

 the last joint more elongate than in B. rtibicunda. Palpi yel- 

 low, resembling in form those of the above mentioned species. 

 Prothorax one-third loncrer than the head and one-fifth wider 

 than long,- less convex, sides more evenly rounded, the median 

 fovea smaller, punctiform, in some specimens scarcely visible, 

 lateral fovea? large, in full view from above. Elytra impunc- 

 tate but somewhat uneven, the lustre however not being 

 impaired; the shoulders are less prominent and the pubes- 

 cence inconspicuous, otherwise they are like those of B. rubi- 

 ciinda. Abdomen rather narrower, transversely less convex 

 than longitudinally, the basal carinee divergent, nearer together 

 at base and longer than in B. rubiciinda. 



