42
Memoirs on the Coleoptera.
| Atheta nympha n. sp.—Rather slender, moderately convex, shining and somewhat feebly micro-reticulate throughout, the punctures very fine, rather close and asperulate; coloration throughout as in the preceding; head moderate, the eyes not quite their own length from the base, the carinæ all but obsolete and not entire; antennæ nearly as in citata but with the outer joints more transverse, the last larger, pointed and decidedly longer than the two preceding, the second and third moderately elongate, subsimilar; prothorax shorter, strongly transverse, not quite as wide as the elytra and very much wider than the head, shining, parallel and rounded at the sides, not impressed; elytra less transverse, very much longer than the prothorax; abdomen nearly similar, the sixth tergite (♂) broadly, feebly arcuato-truncate and evenly, rather coarsely and strongly crenulate throughout; mesosternal process extending two-thirds the length of the coxæ, rather wide, gradually and sinuously narrowed to the rounded apex, which is separated by a considerable distance from the strongly angulate metasternum, the intervening ridge not much sunken and broadly convex; hind tarsi slender, the first four joints nearly equal, the first scarcely visibly shortet. Length 2.3 mm.; width 0.48 mm. New York (Catskill Mts.). |
Related to citata but abundantly distinct in its larger terminal joint of the antennæ, shorter, shining and unimpressed pronotum and other characters.
| Atheta discreta n. sp.—As in nympha in coloration, lustre and sculpture but a little stouter; head nearly similar but more transverse, the carinæ fine but strong and completely entire; antennæ shorter, stouter, gradually more strongly incrassate, the subapical joints very short and strongly transverse, the last large, gradually pointed, not quite as long as the three preceding combined, the second and third, respectively, rather long and cylindric, and materially shorter and strongly obconic; prothorax well developed, convex, transverse, almost as wide as the elytra and very much wider than the head, parallel and strongly rounded at the sides, with a very obsolete transverse impression before the scutellum; elytra rather large, moderately transverse, much longer than the prothorax, the sides slightly diverging from the base; abdomen very much narrower than the elytra, otherwise nearly as in the preceding, the sixth tergite (♂) rather narrow, broadly arcuate and strongly, coarsely crenulate at apex, the sixth ventral plate rather narrow and strongly, evenly rounded; mesosternal process not distinctly exposed in the single type, but separated from the acute process not distinctly exposed in the single type, but separated from the acute apex of the long and angular metasternum by a considerable space, the intervening ridge more narrowly convex than in nympha and the metasternal projection a little longer, narrower and more acute; tarsi nearly similar. Length 2.0 mm.; width 0.5 mm. New York (Catskill Mts.). |
Resembles nympha but differs in its stouter form, shorter antennæ, with more transverse outer joints and relatively still longer eleventh and different second and third joints; also in its strong and entire infra-lateral carinæ, larger prothorax and elytra and narrower abdomen.
