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of the abdomen barely traceable; punctures very fine and not close-set, evidently separated and but little larger on the elytra; head, eyes and carinæ as in the preceding, the head not so transverse; antennæ dark piceous-brown, dark testaceous basally, extending well behind the prothorax, the outer joints very moderately transverse, the last longer than the two preceding, the second and third moderately elongate, the latter the longer; prothorax moderately transverse, parallel, evenly and moderately rounded at the sides, much wider than the head and evidently narrower than the elytra, the basal impression small and barely visible; elytra rather large, only moderately transverse, much longer than the prothorax; abdomen slightly narrower than the elytra, parallel, narrowed a little near the apex, the fifth tergite barely as long as the fourth, the sixth (♂) rather broadly truncate, moderately but strongly crenulate, the lateral crenule slightly elongate but thick, dentiform; mesosternal process extending well behind the middle of the coxæ, gradually and sinuously narrowed to the acute but not at all aciculate apex, which is separated from the large, equilatero-triangular metasternal projection by a rather short, sunken, broadly and feebly convex interval; hind tarsi rather slender, the first joint very much shorter than the second. Length 2.65 mm.; width 0.75 mm. Iowa (Cedar Rapids),—Brendel. |
Distinguishable from allied species by the rather narrower, less transverse prothorax, sternal and tarsal characters.
| Atheta spadix n. sp.—Coloration, sculpture and shining lustre as in the preceding, the abdomen not paler basally, except narrowly and faintly at the apices of the segments, the elytra and legs uniformly pale, the antennæ similarly dark piceous-brown and but slightly paler basally; head orbicular, but slightly transverse, the eyes rather prominent, at less than their own length from the base, the carinæ fine, almost entire; antennæ notably long and thick, gradually and very feebly incrassate, the outer joints but very slightly wider than long, the last distinctly longer than the two preceding, the second moderately, the third distinctly, more elongate; prothorax rather smaller in size, transverse, distinctly wider than the head and quite as distinctly narrower than the elytra, parallel, evenly and very moderately rounded at the sides, not definitely impressed; elytra rather large, only moderately transverse, very much longer as well as wider than the prothorax; abdomen narrower than the elytra, parallel, narrowing a little apically, the fourth and fifth tergites equal, the sixth (♂) moderately wide and transversely truncate at apex, the truncature strongly, evenly crenate, the lateral crenule larger, rather long, forming a slender, externally rounded process; mesosternal process extending nearly to apical fourth of the coxæ, gradually narrowed and with the apex very slender and acute but not aciculate, separated from the moderate and angulate metasternal projection by a short depressed interval, which slopes anteriorly under the process; basal joint of the hind tarsi a little shorter and thicker than the second. Length 2.65 mm.; width 0.75 mm. New York (near the city). |
A moderately large species, allied to replicans but differing in the longer, more acute mesosternal process, still longer antennæ, more nearly entire cephalic carinæ and other characters.
