44
Memoirs on the Coleoptera.
| Atheta freta n. sp.—Moderately slender and convex, feebly shining, finely micro-reticulate, the head most strongly so (♂), the abdomen faintly and irregularly, the punctures very fine and close, asperulate; color piceous-black, the prothorax but little paler, the elytra and legs moderately pale; head broadly, longitudinally and feebly impressed (♂), the eyes moderate, the carinæ fine and scarcely entire, the antennæ piceous, gradually paler basally, slender, moderate in length, feebly incrassate, the outer joints evidently transverse, the last slightly longer than the two preceding, the second and third equal, feebly and strongly obconic respectively; prothorax moderately transverse, but little narrower than the elytra, much wider than the head, parallel and evenly arcuate at the sides, scarcely impressed; elytra moderately transverse, much longer than the prothorax; abdomen narrower than the elytra, parallel basally, thence feebly narrowing apically, the punctures rather close but feeble, the fifth tergite much longer than the fourth, the sixth (♂) broadly, transversely truncate and very finely but distinctly crenulate, the lateral crenelures scarcely larger but more pointed and dentiform. Length 2.5 mm.; width 0.55 mm. North Dakota (Bismarck). |
The antennæ and male sexual characters are sufficiently distinctive to identify this species, which is a little smaller than either of the two preceding.
| Atheta evecta n. sp.—General form, coloration and sculpture as in annexa, rather shining, the micro-reticulation moderately developed, the abdomen with not very dense and unevenly wavy transverse strigilation; head moderate, transversely oval, the eyes at less than their own length from the base, the carinæ fine but sharp, not entire; antennæ moderately long, gradually somewhat strongly incrassate, blackish, testaceous basally, the outer joints fully one-half wider than long, the eleventh longer than the two preceding, the second and third moderately elongate, subequal; prothorax transverse, nearly as wide as the elytra, much wider than the head, slightly widest and rounded at the sides anteriorly, not definitely impressed; elytra evenly pale, short and transverse, with feebly diverging sides, the suture only slightly longer than the prothorax; abdomen black, piceous at tip, the two basal segments pale testaceous and parallel, thence feebly tapering to the apex, the fifth tergite longer than the fourth, the sixth (♂) rather broadly truncate, moderately, somewhat acutely and not very regularly crenulate, the crenules larger at the sides, the lateral ones more projecting, slender and subspiniform; mesosternal process not extending behind the middle of the coxæ, the apex very finely acute, separated from the rather short and broadly angulate metasternum by a long depressed space, in which the ridge is notably acute; hind tarsi slender, the basal joint shorter than the second. Length 2.5 mm.; width 0.62 mm. Mississippi (Vicksburg). |
Resembles annexa somewhat, but differs in the prothorax, which is parallel and evenly rounded at the sides in that species.
| Atheta replicans n. sp.—Moderately stout and convex, piceous, the head and abdomen black, the latter feebly paler basally, the elytra and legs pale; surface shining, the micro-reticulation obsolete, the minute wavy strigilation |
