Page:Memoirs on the coleoptera (IA memoirsoncoleopt01case).pdf/67

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 * Atheta (Microdota) alamedana n. sp.—Slightly shining, the reticulation distinct, coarse but feeble on the abdomen; punctures fine, not very close, slightly asperate on the elytra, the pubescence short, not dense; color black or faintly piceous, the elytra brown, the legs pale; head slightly wider than long, parallel, the eyes rather convex, well developed, as long and as prominent as the tempora, the carinæ fine, far from entire; antennæ short, distinctly incrassate, the outer joints mutually similar in form and transverse, the last gradually pointed, barely as long as the two preceding, the second as long as the next two combined; prothorax moderately transverse, much wider than the head and distinctly narrower than the elytra, parallel, feebly arcuate at the sides, the basal angles obtuse but distinct, only slightly blunt, the basal impression feeble, rounded; elytra not quite parallel, evidently shorter than wide, much longer than the prothorax, the apices not sinuate laterally; abdomen rather short, narrower than the elytra, parallel with feebly arcuate sides, the tergites subequal, the fifth (♂) truncate and coarsely but not strongly crenate, the sixth ventral semicircularly rounded; mesosternum extending but little beyond the middle of the coxæ, the apex finely aciculate, rather far removed from the moderate and angulate metasternal projection, the connecting subdepressed ridge narrowly and strongly convex. Length 1.6 mm.; width 0.38 mm. California (Alameda Co.).
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A rather obscure species, agreeing in most of its characters with amicula.

Very distinct from the preceding in its antennæ, absence of cephalic carinæ and other characters.