Casey — Observations on the Staphylinidae. 235 



strongly sinuous. Length 3.1 mm.; width 0.85 mm. Mississippi 

 (Vicksburg) grannlosa n. sp. 



Form rather less stout, convex, polished throughout, similar In coloration 

 to the preceding species, the prothorax and basal segments of the ab- 

 domen faintly rufo-piceous; vestiture very fine, sparse and inconspic- 

 uous; head and antennae nearly as in granulosa, the sparse punctulaton 

 finer and scarcely visible, the occiput not at all impressed at the 

 middle, the third antennal joint but little longer than the second, the 

 ninth and tenth similarly elongate ; prothorax smaller, about as long as 

 wide, equal in width to the head, the sides circularly rounded to the 

 neck from just before the middle, thence less abruptly but equally 

 strongly converging and sinuate to the base, the surface very finely, 

 sparsely punctulate throughout, becoming granulose only near the 

 posterior end of the equally deep and similar sulcus, the surface 

 adjoining the latter not broadly flattened but strongly convex; scutel- 

 lum sparsely granose, the granules more narrowly parted along the 

 middle, forming a narrower channel which is not at all impressed ; 

 elytra less transverse, four-fifths wider than the prothorax and a third 

 longer, otherwise similar in form and finely, deeply impressed on the 

 suture for a short distance behind the scutellum, the punctulation much 

 finer and everywhere sparse, the granulation toward the scutellum 

 extremely fine, sparse and scarcely distinct even under high power of 

 the hand lens; abdomen and intermesocoxal parts nearly similar, the 

 hind tarsi scarcely two-thirds as long as the tibiae. Length 3.2 mm. ; 

 width 0.76 mm. Mississippi (Vicksburg) illnstris n. sp. 



6 — Form stout, convex as usual, shining, piceous-brown in color, the head 

 and abdomen slightly darker; legs and antennae pale throughout; 

 vestiture rather coarse and distinct but short and decumbent; head 

 wider than long, the basal angles very broadly rounded, the punctures 

 fine and sparse, subasperate on the occiput, the latter not impressed; 

 antennae extending fully to the end of the elytra, stout, feebly incras- 

 sate and compact, the subapicai joints fully as long as wide and sub- 

 equal, the third much longer than the second; prothorax about as wide 

 as the head and as long as wide, the sides rounded and infiated ante- 

 riorly, strongly, abruptly converging and broadly sinuate thence to the 

 base, the surface finely, sparsely punctulate, the punctures becoming 

 close and granose throughout the length on the convex slopes of the 

 sulcus, the surface at the sides near the base obliquely and linearly 

 impressed; base sinuate, fitting over the scutellum, the latter densely 

 granulose and opaque, paler in color, the granules finely parted along 

 the midd.e, the channel inconstant and unimpressed; elytra wider than 

 long, large, of the usual form, the punctures very fine, dense and 

 granuliform toward the scutellum; abdomen as in granulosa but more 

 densely puncvulate posteriorly, the punctures similarly coarser, asperate 

 and very sparse toward base. Length 3.1mm.; width 0.8 mm. Ohio 

 and Michigan. [= Aleochara bil. Say] bilobata Say 



Form much less stout, shining, dark rufo-piceous, the head and posterior 

 parts of the abdomen darker, the first three segments of the latter and 

 the legs pale testaceous; antennae blackish, paler toward base; pubes- 

 cence very fine, inconspicuous; head rather larger than in bilobata, 



