STAPHYLINID.E. 193 



than wide, equal in width to the elytra and a little longer, only very 

 slightly wider than the head, the punctures medially forming two widely 

 spaced longitudinal series; elytra coarsely, deeply and loosely punctate, 

 with an impunctate line separating the upper surface from the inflexed 

 flanks; abdomen parallel, nearly as wide as the elytra, shining, the punc- 

 tures fine but strong, rather close-set, the hairs short; male with a shallow 

 sinus at the apex of the sixth ventral, the bottom of the sinus bisinuate, 

 the apical and basal margins of the sixth each with a very small depres- 

 sion; sixth ventral of the female evenly rounded at tip. Length 14.0- 

 15.0 mm.; width 2.1-2.3 mm. Atlantic coast regions. ... picipes Erichs. 

 Form very slender and more depressed, parallel, nearly similar in color- 

 ation and lustre, the abdomen feebly rufescent apically; head (9) 

 about as wide as the prothorax, strongly and remotely punctate, much 

 more closely so basally; prothorax slightly longer than wide, the sides 

 more converging from apex to base, the punctures sparse but much more 

 numerous' than in picipes and notably fine and feeble, aggregated but 

 not lineiform along the broad impunctate line; elytra parallel, slightly 

 elongate, fully as long as the prothorax, barely as wide as the apex of 

 the latter, the punctures closer and smaller than in picipes though well 

 separated and deep, without trace of the lateral impunctate line; ab- 

 domen less parallel, toward apex fully as wide as the elytra, other- 

 wise nearly as in picipes; male unknown; female with the sixth ventral 

 evenly and broadly rounded at apex, the under surface of the abdomen 

 similarly strongly punctured, with coarse and remote punctures inter- 

 mingled. Length 13.7 mm.; width 1.8 mm. Texas (El Paso). 



obsidianus n. sp. 



Picipes seems to be rather rare and obsidianus is represented 

 by a single specimen, taken by Mr. Dunn; perhaps it may have 

 been mistaken for picipes by Dr. Sharp. 



Pinophilus Grav. 



This genus is represented by a few species in the Atlantic regions, 

 but by numerous forms of the parcus-densus type in the dry Sonoran 

 provinces of the southwest; they all belong to typical Pinophilus, 

 as denned by Dr. Sharp, having the prothorax oblong, with the sides 

 feebly converging from apex to base; those known thus far may 

 be described as follows : 



Elytra large, notably wider and longer than the prothorax 2 



Elytra less developed, not wider and frequently shorter than the prothorax. 10 

 2 Body large and thick in form, black throughout, the legs pale, the antennae 



pale, with the dilated apices of the joints darker as usual 3 



Body much smaller and narrower, frequently not wholly black in color, the 



legs and antennae as in the preceding group 4 



3 Form very stout, moderately convex, deep black and rather shining; head 



large, almost as wide as the prothorax, finely punctured, with some 



T. L. Casey, Mem. Col. I, Sept. 1910. 



