STAPHYLINID/E. 



97 



with straight sides, the fifth tergite but little longer than the fourth, 

 the sixth (cf ) with sexual characters similar to those of gnoma, the sixth 

 ventral, however, much more broadly rounded and less distinctly para- 

 bolic than in that species. Length 2.0 mm.; width 0.54 mm. Rhode 

 Island (Boston Neck). 



The species with which this seems to have the closest affinity is 

 probably gnoma, but it differs in its narrower form of body and 

 evidently smaller head; from comitata it differs in its relatively 

 still more slender form, smaller head, less transverse and more 

 parallel elytra, and, from nata, in its larger size, smaller head and 

 much more developed antennae; the latter character also distin- 

 guishes it from diffisa. 



Atheta villica n. sp. Subparallel, moderately convex, shining, the 

 micro-reticulation ieeble but everywhere polygonal, the punctures 

 fine, moderately close, very sparse on the abdomen; pubescence distinct, 

 subdecumbent, rather long but sparse on the abdomen; color blackish 

 throughout, the abdominal tip and the elytral humeri testaceous; under 

 surface paler, the legs very pale; head moderate, fully two-thirds as 

 wide as the prothorax, the eyes large, at about half their length from the 

 base, the carinae fine, entire; antennae short, infuscate and rapidly strongly 

 incrassate distally, very slender and pale basally, the second joint as long 

 as the first and very much longer than the third, fourth almost as long 

 as wide, the tenth nearly twice as wide as long, the last relatively un- 

 usually large, ogivally acute and almost as long as the three preceding; 

 prothorax less than one-half wider than long, parallel, the sides feebly 

 arcuate, more rounding anteriorly, the base rounded, the surface un- 

 impressed; elytra large, slightly shorter than wide, with very feebly- 

 diverging and almost straight sides, at base very slightly wider, the 

 suture fully two-fifths longer, than the prothorax; abdomen parallel, 

 much narrower than the elytra, the fifth tergite slightly longer than the 

 fourth and trapezoidal. Length 1.8 mm.; width 0.5 mm. Pennsylvania 

 (near Philadelphia). 



A very distinct species, differing from any of the preceding in 

 coloration and in antennal structure. The type is a female, having 

 the fifth tergite very broadly rounded. 



Atheta amens n. sp. Very small, rather convex, shining, with fine 

 asperulate and only moderately close punctures, very sparse on the 

 abdomen, where the feeble reticulation is transversely polygonal, the 

 pubescence not conspicuous; color rather pale piceous, the head darker; 

 elytra much paler, wholly tawny flavate, the abdomen with a large sub- 

 apical black cloud, the legs pale; head well developed, three-fourths as 

 wide as the prothorax, evidently transverse, with parallel rounded sides, 

 the eyes moderately convex and at about their own length from the base; 

 antennae thick, rather short, not very rapidly incrassate and blackish 



T. L. Casey, Mem. Col. II, August 1911. 



