24
Memoirs on the Coleoptera.
only a small proportion of the very confusing host of such species inhabiting various species of fungi:
| Atheta rhodeana n. sp.—Moderately slender and convex, slightly, the abdomen strongly, shining, finely, closely subgranularly punctate, the abdomen minutely and sparsely; vestiture short; color piceous-black, the elytra and legs pale brownish-flavate, the abdomen at top and broadly toward base rufescent; antennæ fuscous, paler basally; head as usual, transverse, parallel, with broadly rounded angles, the eyes at about their own length from the base; carinæ very fine and feeble but entire; antennæ well developed, the outer joints slightly wider than long, the second slightly shorter than the third; prothorax moderately transverse, parallel, evenly rounded at the sides, much wider than the head and evidently narrower than the elytra, scarcely modified medially; elytra large, but slightly transverse, parallel, much longer than the prothorax; abdomen distinctly narrower than the elytra, parallel, the fifth tergite very little longer than the fourth, the sixth (♂) sinuato-truncate at apex, with the large auricular sides more rounded and reflexed externally, sterna nearly similar, the hind tarsi with the first joint very much shorter than the second. Length 2.5 mm.; width 0.65 mm. Rhode Island (Boston Neck). |
The auriculæ of the sixth male tergite are rather better developed in this species than in any of the following:
| Atheta capella n. sp.—Much stouter than the preceding and paler in color, the darker parts not black but dark piceous-brown, the punctuation rather less dense and finer, the pubescence less abundant and longer; head smaller, the eyes larger, at barely two-thirds their length from the base, the carinæ fine, not quite entire; antennæ rather long, the outer joints slightly wider than long, the second much shorter than the third; prothorax much larger, fully as wide as the elytra, nearly one-half wider than the head, the sides rounded, notably arcuato-convergent anteriorly, nearly one-half wider than long; elytra moderately transverse, the suture not greatly though distinctly longer than the prothorax; abdomen much narrower than the elytra, parallel though narrowing slightly apically, the fifth tergite slightly longer than the fourth, the sixth (♂) sinuato-truncate at apex, with the large auricular sides more rounded and reflexed externally; sterna nearly similar, the hind tarsi with the first joint very much shorter than the second. Length 2.5 mm.; width 0.65 mm. Rhode Island (Boston Neck). |
Very distinct from the last in its larger and more anteriorly narrowed prothorax, larger eyes and less parallel abdomen.
| Atheta comitata n. sp.—Much smaller, more slender and parallel, rather strongly shining, nearly similar in coloration and sculpture, the vestiture shorter especially on the abdomen, nearly as in rhodeana; head relatively larger, the eyes somewhat prominent, very well developed, at much less |
