Page:Memoirs on the coleoptera (IA memoirsoncoleopt01case).pdf/66

58 {|style="font-size:90%" cellpadding=0 cellspacing=0
 * Atheta (Nemota) perpera n. sp.—Subparallel, rather convex, shining, black, the elytra dark piceous-brown, the legs pale, the punctures small, sparse, not dense and scarcely asperate on the elytra, the vestiture rather sparse and moderately coarse; head nearly as long as wide, slightly broadening basally, the eyes moderately convex, at fully their own length from the base, the carinæ obsolete; antennæ short, blackish, slender basally, the second and third joints elongate, subequal, the fourth a little longer than wide, thence gradually distinctly incrassate, the outer joints moderately transverse, the last fully as long as the two preceding; prothorax moderately transverse, much wider than the head but almost as wide as the elytral base, the parallel sides evenly and moderately arcuate, unimpressed; elytra subparallel, a little shorter than wide, much longer than the prothorax, the apices laterally feebly sinuate; abdomen nearly as wide as the elytra, parallel, narrowing just visibly apically, the fifth tergite longer than the fourth. Length 1.7 mm.; width 0.4 mm. California (Ojai),—Fall.
 * }
 * }

This species is aberrant in the tarsi, the basal joint of the posterior being elongate though scarcely so long as the second. The metasternum is transverse and does not project forward at all. The elytra are as transversely convex as the pronotum, the suture narrowly impressed at base.

The coloration will distinguish this species from any of the preceding and also the less incrassate antennæ; the sterna are as in the other species; the hind tarsi are missing in the type.



The following species seem to be sufficiently allied in general organization to Microdota amicula Steph., to be included in the same subgeneric group, at least for the present: