Staphylinidæ.
59
| 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.). |
A rather obscure species, agreeing in most of its characters with amicula.
| Atheta (Microdota) saturata n. sp.—Blackish-piceous, the abdomen black, the elytra scarcely paler than the prothorax, the legs piceous; punctures very fine, the pubescence short, not dense, inconspicuous; surface moderately shining, the reticulation feeble, coarse but feeble on the abdomen; head slightly wider than long, wider basally, the eyes but slightly convex and shorter than the much more prominent and rounded tempora, the cairnæ wholly wanting; antennæ dark brown, moderately short, gradually distinctly incrassate, the ninth joint transverse, a little shorter than the tenth, the last gradually acute, rather longer than the two preceding, the second elongate, only a little longer than the third; prothorax as in the preceding but with the basal angles less evident and except in being only a little wider than the decidedly larger head, though more evidently narrower than the elytra, the latter larger, more transverse, much longer as well as wider than the prothorax, not evidently sinuate at the apices; abdomen much narrower than the elytra, subparallel, the fifth tergite much longer than the fourth, the sixth ventral in the type rather produced, with its apex broadly and circularly rounded; first four joints of the hind tarsi equal. Length 1.85 mm.; width 0.4 mm. California (Lake Tahoe). |
Very distinct from the preceding in its antennæ, absence of cephalic carinæ and other characters.
| Atheta (Microdota) ficta n. sp.—Piceous, the head and abdomen black, the legs pale piceous; surface slightly shining, the reticulation somewhat coarse but not strong, moderate and feeble on the abdomen, where it is transversely disposed posteriorly, the punctures fine, not dense, the vestiture |
