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cylindric and strongly obconic respectively; prothorax only moderately transverse, parallel and nearly straight at the sides, rounding apically and basally, the basal angles obtuse, distinctly though not very greatly wider than the head and correspondingly narrower than the elytra, the latter rather large, very moderately transverse, much longer as well as distinctly wider than the prothorax; abdomen evidently narrower than the elytra, parallel throughout, the sides not quite straight, the fifth tergite distinctly longer than the fourth; mesosternal process becoming fine and aciculate apically at about the middle of the coxæ and well separated from the acute apex of the rather long metasternal projection; two basal joints of the hind tarsi short and equal, the third and fourth longer and also equal. Length 2.0 mm.; width 0.52 mm. Queen Charlotte Islands (Massett),—Keen. |
Very distinct by reason of the complete absence of the usual infra-lateral carinæ of the head. The sex of the types is not very definite, the sixth tergite being feebly sinuato-truncate medially, with the edge unmodified.
| Atheta luscitiosa n. sp.—Rather stout, convex and fusoid, shining, minutely punctulate, sparsely and simply so except on the elytra, where the punctures are strongly asperate and close; color dark rufo-piceous throughout, the legs and antennæ concolorous, the abdomen blackish; head transversely orbicular, the eyes at about their own length from the base, not at all prominent, the small facets convex but separated anteriorly, becoming flat and diffused posteriorly, the carinæ strong and entire; antennæ rather short and slender, feebly and gradually incrassate, the outer joints but slightly wider than long, the last slender and not as long as the two preceding, the third very moderately, elongate; prothorax convex and only moderately transverse, parallel and very moderately rounded at the sides, distinctly though not very greatly wider than the head and much narrower than the elytra, obsoletely impressed before the scutellum; elytra parallel, larger, only a little wider than long, very much longer than the prothorax; abdomen narrower than the elytra, parallel, gradually narrowing a little behind, the fifth tergite much longer than the fourth, the sixth (♀) rounded apically; mesosternal process finely aciculate apically, extending well behind the middle of the coxæ and separated from the short obtuse metasternum by a rather long depressed space; posterior tarsi long, the basal joint apparently shorter than the second. Length 2.7 mm.; width 0.77 mm. California (Lake Tahoe). |
The peculiarly long second antennal joint in comparison with the much shorter third joint, in conjunction with the structure of the eyes and sterna, will render this species very easy to identify.
| Atheta innocens n. sp.—Stout, nearly parallel, moderately convex, somewhat shining, black, the prothorax barely picescent, the elytra castaneous, darker towards the scutellum, the legs pale; punctures fine, moderately separated, feebly asperulate; head rather large, transverse, parallel, the eyes well developed, rather convex, setose, at distinctly less than their own |
