Page:Memoirs on the coleoptera (IA memoirsoncoleopt01case).pdf/27

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Staphylinidæ.
19

carinæ fine but strong, entire; antennæ rather long, incrassate only distally, strongly setose, the outer joints strongly transverse, the last rapidly pointed and as long as the two preceding; prothorax minutely, sparsely punctate, but little wider than long, only slightly wider than the head, parallel, evenly and moderately rounded at the sides, rather convex, not impressed; elytra wider than long, much wider and longer than the prothorax, finely, very distinctly and closely punctate; abdomen narrower than the elytra, very slightly narrowed near the apex, shining, minutely, sparsely punctate; mesosternal process very long and gradually finely aciculate, extending to apical fifth of the coxæ, where it is separated from the angular mestasternum by a very short interval, the coxæ not contiguous; first four joints of the hind tarsi equal. Length 2.7 mm.; width 0.65 mm. California (Sta. Barbara).

The type, although a female, is described because of its isolated characters relating to the sterna, cephalic carinæ and general outline.

Atheta pocahontas n. sp.—Moderately shining, black, the elytra feebly picescent, the antennæ, except toward base, black; legs pale piceous-brown; vestiture very short; head parallel, transverse, the eyes not prominent, at more than their own length from the base; carinæ fine but entire; surface with rather coarse but obsolescent punctures; antennæ rather short, gradually, and moderately incrassate distally, the outer joints transverse; prothorax slightly wider than long and very little wider than the head, with broadly rounded sides which become straighter basally, widest rather before the middle, not impressed, very finely, rather closely punctate; elytra large, slightly transverse, much wider and very much longer than the prothorax, finely but strongly, closely punctate, each deeply sinuate at apex externally; abdomen much narrower than the elytra, parallel basally, feebly and arcuately narrowing apically, shining, minutely, sparsely punctate; mesosternal process extremely long, gradually and finely aciculate, extending fully to apical fifth or sixth of the coxæ, separating the latter, its tip very close to the apex of the acutely angulate and sharply defined metasternal projection; basal joint of the hind tarsi one-half longer than the second, two to four equal. Length 2.6 mm.; width 0.66 mm. Virginia (Norfolk and Fort Monroe).

Readily distinguishable by the sternal and tarsal characters; the types are apparently females.

Atheta vaticina n. sp.—Similar in all of its structural characters to the preceding but smaller and more parallel, the vestiture longer and more shaggy, the head similarly convex, shining and rather coarsely though feebly punctate, the antennæ notably more slender, much less incrassate distally; prothorax nearly similar; elytra differing in being very nearly as long as wide and paler, rufescent; abdomen rather more strongly and distinctly punctulate; fifth tergite similarly distinctly shorter than the fourth; tarsi similar. Length 2.2 mm.; width 0.55 mm. New York (Willets Point, Long Island).

Closely allied to pocahontas in general structure but differing in the more slender antennæ, much smaller size and more elongate elytra. I have in my collection several specimens taken at Alameda,