Casey — Observations on the Staphylinidae. 303 



sides somewhat converging from near ttie apex to the base, the latter 

 broadly arcuate, the remote punctures small; elytra slightly wider and 

 two -fifths longer than the prothorax, with fine and sparse asperulate 

 punctures and rather short darkish hairs throughout; abdomen at base 

 as wide as the elytra, the sides rapidly tapering thence to the tip ; sixth 

 tergite rounded in the female. Male unknown. Length 1.2 mm.; width 

 0.62 mm. Pennsylvania (Westmoreland Co.) obesnla n. sp. 



Form less stout, subparallel, polished, very obsoletely micro -reticulate, 

 the abdomen more finely and distinctly, black, the prothorax slightly 

 piceous, the elytra piceo-flivate, darker externally and apically, the 

 abdomen dark rufoas, with the fourth tergite and most of the fifth' 

 black; head rather well developed, with sparse and distinct punctures- 

 laterally, the antennae stout distally, the outer joints transverse, black 

 beyond the fourth, five to eleven gradually very slightly thicker but 

 producing the general impression of a loose parallel club; prothorax. 

 relatively smaller than in the two preceding species, nearly twice as 

 wide as long, only slightly wider than the head, the sides subparallel 

 and rather strongly arcuate, the remotely scattered punctures some- 

 what distinct; elytra transverse, a fourth or fifth wider and two- fifths 

 longer than the prothorax, the humeri perceptibly exposed, the punc- 

 tures minute, obsolete toward the scutellam, fine, closer and more 

 distinct near the external apical angles; abdomen arcuately and moder- 

 ately tapering from base to apex, not quite as wide as the elytra, the 

 sixth tergite rounded in the female. Male unknown. Length 1.16 mm.; 

 vddth 0.51 mm. Mississippi (Vicksburg) micans n. sp. 



19 —Form elongate, rather slender, subparallel, polished, not distinctly 

 micro-reticulate except on the abdomen, dusky-testaceous, the elytra dark 

 piceo-flavate, the abdomen paler flavate, with a very small medial cloud 

 near the apex; head rather well developed, with a few scattered punctures 

 toward the sides; antennae pale, only moderately stout, the outer 

 joints not very strongly transverse and gradually very slightly Infu- 

 mate toward tip; prothorax not distinctly wider than the head, a fourth 

 or fifth wider than long, the sides long, subparallel and moderately 

 arcuate, the base broadly rounded, the angles rounded though- 

 obvious, the surface with rather numerous small punctures scattered 

 along the medial regions from base to apex; elytra only moderately, 

 transverse, two-fifths wider and longer than the prothorax, the humeri^ 

 somewhat distinctly expDsed, rounded, the punctures fine, sparse and' 

 indistinct; abdomen subequai in width to the elytra, but little nar- 

 rowed at tip; sixth tergite rounded or subtruncate in the female. Male 

 unknown. Length 1.1 mm.; width 0.45 mm, Pennsylvania (near 

 Philadelphia) and Rhode Island (Boston Neck) egena n. sp. 



Form slender, subparallel, polished, not evidently micro-reticulate, pale 

 flavate, the head but little darker, the elytra infum^ite posteriorly, the 

 abdomen scarcely maculate; head with a few sparse punctures, feebly 

 Impressed at each side of the middle, the impressioas connected by a 

 feeble transverse impression behind the frontal margin; antennae 

 flavate, the outer joints moderately transverse; prothorax subequai iu 

 width to the head, about a fourth wider than long, rounded at the 

 sides, the latter more conrerging toward apex from near the middle 



