46
Memoirs on the Coleoptera.
| Atheta bucolica n. sp.—Dark piceous, the head black, the abdomen dark testaceous, shaded black subapically, the ventral segments darker toward their bases, the legs very pale, the elytra pale, slightly darker extero-posteriorly and near the scutellum; surface moderately shining, not strongly sculptured; head transversely orbicular, the eyes at less than their own length from the base, the carinæ fine, subentire; antennæ slender and pale through the fourth joint, then gradually and moderately incrassate and black to the tip, rather small in size, the outer joints very moderately transverse, the last gradually and acutely pointed and notably longer than the two preceding, the second and third slender and elongate, the latter slightly the longer; prothorax moderately transverse, parallel and evenly rounded at the sides, distinctly wider than the head and narrower than the elytra, which are rather strongly transverse, though evidently longer than the prothorax; abdomen narrower than the elytra, the sides parallel and feebly arcuate; mesosternal process long, extending to apical fourth of the coxæ, gradually and sinuously narrowing but still rather wide even at the strongly rounded apex, which is not very distant from the broadly and obtusely angulate and blunt metasternum, the depression broadly, transversely convex; first two joints of the hind tarsi short, equal, the next two longer and equal. Length 2.75 mm.; width 0.73 mm. Mississippi (Vicksburg). |
Though described from the female, this species is so evidently homologous in its structure with the preceding, that there can be but little doubt that the sixth male tergite is crenate at tip. It is distinct in its antennal and sternal structure and in coloration.
Traumœcia Rey.
I have applied this subgeneric name to a few species which resemble Atheta in all essential structural characters, but are of very small size and rather slender form.
| Atheta (Traumœcia) ithacana n. sp.—Dark piceous, the head and abdomen blackish, the elytra dark piceous-brown, the legs pale; surface rather shining, the micro-reticulation moderate, stronger on the elytra, the punctures very fine, asperulate and close on the elytra; head moderately transverse, the eyes rather large and more prominent than the tempora, which are shorter, parallel and straight to the rounded basal angles; carinæ fine, feeble, not quite entire; antennæ extending to the middle of the elytra, rather thin, the outer joints moderately transverse, the last as long as the two preceding, the second long, cylindric, the third much shorter, obconic; prothorax moderately transverse, distinctly wider than the head and narrower than the elytra, parallel but only feebly arcuate at the sides, finely impressed along the median line; elytra but slightly wider than long, much longer than the prothorax; abdomen much narrower that the elytra, parallel, very slightly narrowing apically, the fifth tergite much longer than the fourth, the sixth feebly and gradually sinuate medially at tip in the type; mesosternal process extending slightly behind the middle of the coxæ, gradually and finely pointed, separated by a considerable interval from the rather short but broadly angulate metasternum, |
