Staphylinidæ.
43
| Atheta disjuncta n. sp.—Rather stout, moderately convex, strongly shining throughout, the micro-reticulation virtually obsolete, the abdomen faintly opalescent from the minute and extremely close but faint micro-strigilation; pubescence rather long, not close; punctures minute, not close-set and feebly asperulate; color piceous-black, the prothorax dark piceous, the elytra and legs very pale; head moderate, the eyes at less than their own diameter from the base, the carinæ fine and virtually entire but not joined to the buccal margin as they are in discreta; antennæ rather long, only feebly incrassate, piceous-black, very gradually testaceous basally, the outer joints very nearly as long as wide, the lasts slender, gradually pointed, longer than the two preceding, the second and third much elongated, the latter the longer; prothorax moderately transverse, much wider than the head, not quite as wide as the elytra, parallel and evenly, rather strongly arcuate at the sides, the ante-scutellar impression small and very feeble; elytra moderately transverse, distinctly longer than the prothorax; abdomen slightly narrower than the elytra, parallel, with very slightly arcuate sides, the first five tergites short, equal in length, the sixth (♂) abruptly truncate, the truncature feebly, angularly sinuate and coarsely, strongly crenulate; mesosternal process extending fully two-thirds of the coxæ, gradually and sinuously narrowed and prolonged but appreciably wide, the apex rather acute, separated from the broadly angulate metasternum by a moderate space, which is slightly depressed and broadly, transversely convex; two basal joints of the hind tarsi short and subequal, the next two a little longer. Length 2.6 mm.; width 0.7 mm. Pennsylvania (Allegheny) and North Carolina (Asheville). |
The abdomen is somewhat as in strigosula, but the species is very different in its shining surface, larger prothorax and other characters.
| Atheta annexa n. sp.—Rather stout and convex, shining, the micro-reticulation somewhat feeble, coarse on the abdomen, the punctures minute, faintly asperulate, not close except on the elytra; color black, the prothorax piceous, the abdomen at tip and the two basal segments, the elytra, legs and antennæ basally, testaceous, the elytra dark at the scutellum and each apical angle; head rather transverse, the eyes moderate, the carinæ fine, not quite entire; antennæ moderately short and stout, feebly incrassate and pale brown distally, the outer joints moderately transverse, the last much longer than the two preceding, the second and third elongate, subequal, the latter slightly the longer; prothorax transverse, about as wide as the elytral base; much wider than the head, parallel and strongly rounded at the sides, scarcely at all impressed; elytra slightly wider and much longer than the prothorax; abdomen much narrower than the elytra, parallel basally, gradually feebly narrowing thence to the tip, the fifth tergite distinctly longer than the fourth, the sixth (♂) broadly and rectilinearly truncate and strongly, not very coarsely crenulate, the lateral crenelures a little longer than and dentiform; mesosternal process narrow, subacutely rounded at tip, extending well behind the middle of the coxæ and rather well separated from the angulate, rather narrow and pronounced metasternal projection. Length 2.6 mm.; width 0.65 mm. North Carolina (Asheville). |
Distinguishable readily by the antennal characters and coloration.
