Memoirs on the Coleoptera/Volume 1/New Species of the Staphylinid Tribe Myrmedoniini/Tribe Myrmidoniini/Group Athetæ/Atheta/Lamiota

by Thomas Lincoln Casey

Lamiota n. subgen.

Mesosternal process rather long, extending nearly to apical fourth of the coxæ, rather wide, the apical-prolonged part becoming parallel, with its apex rounded and separated from the short and very broad angulate metasternal projection by a moderate interval; the first four joints of the hind tarsi are equal, the infra-lateral carinæ of the head very fine and feeble, though nearly entire, and the eyes moderate in size. The type is the following:

Atheta (Lamiota) keeni n. sp.—Rather stout, moderately convex, strongly shining though sharply micro-reticulate, the punctures fine but subgranose, the abdomen minutely and feebly, transversely strigilate; black, the elytra piceous, the legs and antennal base pale flavo-testaceous; remainder of the antennæ black; head well developed, with a small impressed puncture in both sexes, the eyes rather prominent, at their own length from the base; antennæ rather long and very gradually and moderately incrassate, the outer joints wider than long; prothorax strongly transverse, much longer than the prothorax, very finely but sharply, not very densely punctuato-granulose; abdomen almost as wide as the elytra, nearly sculptureless, subparallel, very feebly narrowed toward tip, the fourth and fifth tergites equal in length. Male with the pronotum impressed in median third from near the apex to the base, the sixth tergite with a long pointed compressed process at each side of the broad apex, the edge between the processes evenly and broadly arcuate and tuberculato-crenate; female with the pronotal impression narrow, very feeble and visible basally. Length 3.0-3.4 mm.; width 0.75-0.85 mm. British Columbia (Metlakatla),—Keen, 452.

This strikingly distinct species is dedicated with pleasure to Rev. J. H. Keen, who has made many interesting discoveries among the small clavicorn Coleoptera of the northern coast of British Columbia.