STAPHYLINHXE. 5 



wide, the mesosternal process only extending to slightly be- 

 yond the middle of the coxae, with its apex transversely to 

 circularly rounded and separated from the angular apex of the 

 metasternal projection by a short and slightly depressed interval. 

 This section of Atheta includes numerous species in North America, 

 the following being some of the many allies of klimschi: 



Atheta (Stethusa) affluens n. sp. Stout, parallel, moderately convex, 

 blackish-piceous, the elytra and legs pale, the former obscure flavate, the 

 abdomen black, scarcely paler apically; anterior parts moderately shining, 

 minutely, closely punctulate and finely, closely and inconspicuously pubes- 

 cent; head four-fifths as wide as the prothorax, transversely orbicular, 

 the eyes large; antennae fuscous, pale at base, extending to the middle of 

 the elytra, gradually moderately enlarged distally, the third joint slightly 

 longer than the second, both elongate, the tenth slightly wider than long, 

 the eleventh as long as the two preceding; prothorax two-fifths wider than 

 long, nearly as wide as the elytra, parallel, the sides broadly arcuate, the 

 median line very finely, almost imperceptibly impressed throughout; elytra 

 a little wider and longer than the prothorax; abdomen more shining and 

 more sparsely punctulate, a little narrower than the elytra, subparallel, the 

 fifth tergite ( cf) transversely truncate, unmodified, the sixth strongly arcuate 

 at tip and acutely dentate at each side, the middle of the arc narrowly trun- 

 cate, the truncature marked at each end by a very small convex knob and 

 the surface adjoining feebly impressed. Length 2.7mm.; width 0.7 mm. 

 Rhode Island (Boston Neck) and New York (Long Island). 



Specimens not clearly separable from the considerable type series 

 are before me from New Jersey (Anglesea), North Carolina (Ashe- 

 ville), Mississippi (Pass Christian) "and Arkansas (Little Rock). 

 It is a widely diffused species, readily distinguishable by its large 

 convex eyes, extending almost to the base of the head, by the 

 medial truncature of the sixth male ventral scarcely so wide as the 

 distance separating it from the lateral slender teeth and not extend- 

 ing behind the latter, and by the sternal characters. 



Atheta (Stethusa) irvingi n. sp. Form, coloration and sculpture nearly 

 as in affluens, the head relatively larger but otherwise similar, fully five-sixths 

 as wide as the prothorax, the latter even relatively larger than in affluens, 

 similar, except that the parallel sides are slightly less rounded; antennae 

 with the last joint evidently shorter; elytra similar, but little wider than the 

 prothorax and with the humeri only very narrowly exposed at base; abdo- 

 men less parallel, slightly narrowing near the apex, the fifth tergite (cf) 

 similarly truncate and unmodified, the sixth with the apical arcuation larger, 

 with smaller lateral teeth, the median truncature sinuate, with the adjacent 

 surface more impressed and its ends not marked by swollen points. Length 

 2.5 mm.; width 0.65 mm. New York (Catskill Mts.). 



