Staphylinidæ.
27
veloped sexual characters of the sixth tergite, though these are evidently of the same order.
| Atheta dama n. sp.—Rather more slender and convex, piceous-black, the abdomen only paler basally in apical half of the first three segments; antennæ dark, the basal joint pale; elytra dark piceo-testaceous, the legs pale; integuments feebly shining, finely, asperulately and closely punctate, the abdomen polished; head moderate, the eyes at a little less than their own length from the base, the tempora rather prominent; carinæ fine but entire; antennæ moderately long and stout, the second and third joints equal, each as long as the fourth and fifth combined, the outer joints only moderately transverse; prothorax but slightly transverse, barely a third wider than long, much wider than the head and rather evidently narrower than the elytra, parallel, the sides only moderately rounded; elytra wider than long, much narrower then the elytra, the sixth tergite (♂) truncate broadly at apex and wholly unmodified, except a very small rounded angulation at each side; sterna as usual in this group, the metasternum a little shorter and more broadly angulate; basal joint of the hind tarsi shorter than the second. Length 2.3 mm.; width 0.5 mm. New York (Catskill Mts.). |
Readily distinguishable from either of the preceding by its narrower and much less transverse prothorax, longer antennæ and still more feeble sexual characters.
| Atheta temperans n. sp.—Coloration, sculpture and lustre nearly as in the preceding but very much larger and stouter, the elytra and legs pale brownish-testaceous; vestiture rather longer and coarser; head nearly as in dama, the carinæ very fine and feeble but entire, the antennæ still longer, rather stout, the second and third joints much elongated and feebly obconical, the second slightly the shorter, the tenth but just visibly wider than long; prothorax larger, parallel and more strongly rounded at the sides, two-fifths wider than long, very much wider than the head but only very little narrower than the elytra, the latter less abbreviated though distinctly wider than long, much longer than the prothorax; abdomen thicker, parallel, slightly narrower than the elytra, the fifth tergite less evidently or scarcely longer than the fourth, the sixth (♂) broadly truncate and perfectly even at apex, limited at each side by a very minute right angle having its external side just visibly cariniform; basal joint of the hind tarsi much shorter than the second. Length 2.7 mm.; width 0.66 mm. District of Columbia. |
In this species the male sexual characters are also very feeble, but it may not be known at once from dama by its much stouter form, larger and more transverse prothorax and longer antennæ.
| Atheta tractabilis n. sp.—Rather stout, moderately convex, rufo-piceous, the elytra and legs more flavate, the abdomen paler basally, the basal antennal joints also pale; lustre rather shining, the punctures minute, not dense, larger and slightly asperulate in the elytra; head transversely orbicular, the eyes at much less than their own length from the base, the car- |
