The Pselaphid.-e of North America. 291 



B. CRiBRicOLLis, Brendcl. Piceous- black, elytra dark 

 piceouS-red or black, legs, antennje and palpi red, or darker. 

 The body is punctured all over, more deeply on the pronotum, 

 punctures on the elytra oblong. Pubescence short, appressed. 

 Length, 1.2 to 1.3 mm. 



Head., from the frontal margin to the base, equal to the 

 width between the eyes; frontal margin but slightly produced 

 in the middle, fovete equally distant, the lateral ones half the 

 mutual distance from the eye. Disk punctulate, eyes circular, 

 tempora arcuate, as long as the eyes. Aniennce longer than 

 the head and prothorax, first and second joints equal in thick- 

 ness, the first cylindrical, twice as long as wide, second oval, 

 shorter; third to eigiith equal in thickness, much narrower 

 than the basal joints, third and fifth longer, equal, fourth, sixth 

 and seventh equal in length, eighth quadrate, ninth and tenth 

 obconical, truncate at their bases, strongly increasing in thick- 

 ness, closely united. Last joint twice as long as wide, ovate- 

 acute, truncate at base. Prothorax convex, lateral foveas 

 circular (elliptical when viewed from above), middle fovea 

 oblong. Elytra broadly convex, shoulders high, protuberant, 

 discal lines deep, convergent, sutural lines sHghtly arcuate, 

 the interval roof-shaped elevated, with two rows of punctures 

 on each side of the suture. Abdomen regularly punctured, 

 the basal carinas nearly parallel, half as long as the segment, 

 ventrals punctulate. 5 last dorsal broadly emarginate, last 

 ventral flattened, with a short, conspicuous, transverse impres- 

 sion at its base. Legs darker in the specimens with darker 

 elytra, second tarsal joint longer than the third. . 5 middle tibiae 

 with a short terminal spur. 



Varies in the strength of the punctuation, especially among 

 the females. 



B. scABRA, Brendcl. Black, antennge, palpi and legs red, 

 elytra brownish-black. Length, 1.33 mm. Plate IX., Fig. 62. 



Head punctate, large, subquadrate, not very convex, frontal 

 margin arcuate, fove^e equal and equidistant, the occipital ones 

 in a line with the centers of the prominent, finely-facetted 



