Page:Memoirs on the coleoptera (IA memoirsoncoleopt01case).pdf/52

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 * 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).
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The antennæ and male sexual characters are sufficiently distinctive to identify this species, which is a little smaller than either of the two preceding.

Resembles annexa somewhat, but differs in the prothorax, which is parallel and evenly rounded at the sides in that species.