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inæ very fine and feeble and not entire; antennæ well developed, strongly incrassate distally, the outer joints strongly transverse, the second evidently longer than the third; prothorax strongly transverse, nearly as wide as the elytra, very much wider than the head, parallel and strongly rounded at the sides; elytra moderately transverse, much longer than the prothorax; abdomen much narrower than the elytra, parallel, the sixth tergite (♂) differing much from any of the nine preceding, being rapidly trapezoidal, with the apex rather narrow, transversely truncate medially between the sides, which are slightly produced posteriorly in relatively wide, flat, lobiform extensions, obliquely rounded at the sides but not carinate or thickened; sterna as in the preceding species, except that the metasternal angle is rounded at tip; basal joint of the hind tarsi evidently shorter than the second. Length 2.25 mm.; width 0.62 mm. New York (Catskill Mts.). |
The sexual characters of the male, abbreviated cephalic carinæ and antennal characters will distinguish this species at once among its fellows. In the type the head between the eyes has a large rounded concavity, rather abruptly limited, and so regular that it may be a normal character, especially as the specimen is mature and with hard integuments.
The three following species have male sexual characters very much as in tractabilis and also apparently somewhat as in truncativentris and occidentalis, of Bernhauer.
| Atheta ordinata n. sp.—Slender, moderately convex, dark piceous, the head blackish, the elytra pale castaneous-brown, the legs pale flavate; abdomen black, feebly rufescent basally, moderately shining, strongly micro-reticulate throughout, the punctures minute, rather sparse, close and asperulate on the elytra; head small, but little wider than long, the eyes at nearly their own length from the base, the carinæ fine, feeble, extending only slightly beyond the middle; antennæ blackish, pale basally, moderately short, gradually and rather strongly incrassate, the outer joints strongly transverse, the last rapidly, obtusely pointed, as long as the two preceding, the second moderately elongate and subcylindric, the third a little shorter, constricted basally; prothorax but slightly transverse, parallel, evenly and strongly arcuate at the sides, feebly and finely impressed along the median line basally and with a feeble transverse basal impression, much wider than the head and very little narrower than the elytra, the fourth and fifth tergites equal, the sixth (♂) rather narrow apically and broadly sinuate between the rounded flattened lateral lobes, the outer sides of which are extended anteriorly for a short distance, the surface very strongly reticulate; mesosternal process extending to apical third of the coxæ, becoming gradually finely aciculate, moderately separated from the acutely angulate projecting metasternum, the intervening space much depressed; hidn tarsi rather long and slender, the basal joint shorter than the second. Length 2.3 mm.; width 0.45 mm. New York (Catskill Mts.). |
