The Pselaphid^ of North America. 83 



than the tenth, ovate-acuminate, truncate at the base. Pro- 

 thofax with a very fine, nearly entire median sulcus, and 

 small, acute, basal spines. Elytra narrow-shouldered, the 

 humeri not prominent, space between the sutural lines punc- 

 tulate. Abdomen narrower at the base than the elytra, the 

 fovese nearly equal in width, ventral fovese large, square; 

 anterior tarsi with the larger claw cleft; ? unknown. This 

 species ranks next to B. virginice. 



Habitat. Southern Pennsylvania. (H. Ulke.) 



Since the descriptions of Batrisi were in press we have 

 received specimens of B . foveicornis Cas., and B. -pimctifrons^ 

 Cas., and both species seem entitled to specific distinction. 

 The student is therefore requested to insert in the synopsis 

 after B. o-Jobosiis the followincr: 



o o 



Clypeus conical, not reflexed laterally ; pronotum feebly silicate. 



Tenth antennal joint larger in the 5 than in the $ - foveicornis. 

 Tenth antennal joint of ^ not larger than in the ? - funciifrons. 



B. FOVEICORNIS, Casey. Red, impunctate; pubescence long, 

 sparse. Length 1.9 to 2.0 mm. 



Head as wide as long, face nearly perpendicular to the ver- 

 tex, which latter is wider than long, not very convex, carinate 

 in the middle of the occiput and at the sides, fovea nude, 

 lateral grooves arcuate, dividing the thinly punctured margin 

 in the middle; clypeus large, conical, not reflexed at the sides, 

 sub-frontal groove remarkably inconspicuous. Antennce with 

 the first joint sub-cylindrical, as wide as the ninth, and twice 

 as long as wide; second, one-third shorter and narrower, third 

 to seventh longer than wide, gradually shorter, eighth as long 

 as wide, ninth as long as the eighth, transverse; tenth 

 much wider, globose when viewed from above, flattened 

 below, with a perforate fovea, which in some specimens is ver}' 

 large. Eleventh wider than the tenth and as long as the three 

 preceding together. Prothorax with the foveae and sulci 

 deep, the median sulcus short, disappearing behind the middle, 

 or very much shorter; basal spines small, discal carinas rather 



