6
Memoirs on the Coleoptera.
Resembles affluens very much but distinguishable by the somewhat larger head, shorter last antennal joint and slight differences in the male sexual characters.
| Atheta (Stethusa) galvestonica n. sp.—General form, coloration and sculpture as in klimschi, the punctuation not quite so dense and the lustre more shining, the prothorax shorter, more transverse and paler in color; head well developed, the eyes large but separated from the base by fully two-fifths of their own length, the antennæ more slender, very moderately incrassate, with the outer joints nearly as long as wide; prothorax rather more than one-half wider than long, the basal impression feeble; elytra rather short and transverse, the suture not distinctly longer than the prothorax; abdomen as in klimschi; mesosternal process unusually broad, rounded at tip, which is separated from the triangular metasternal projection by but little more than its own subapical width. Length 2.3-2.5 mm.; width 0.65-0.7 mm. Texas (Galveston). |
Though represented at present by the female only, this species can be distinguished readily from any other by the very wide mesosternal process even for the present genus, and the eyes, which are not quite so large as usual.
| Atheta (Stethusa) texana n. sp.—Of the usual coloration and rather stout form, the head well developed, with the eyes not quite so large as usual and decidedly more prominent; antennæ rather rapidly though moderately incrassate, the outer joints evidently though not greatly wider than long; prothorax not densely punctate, strongly transverse, strongly rounded at the sides, nearly as wide as the elytra, feebly impressed medially except in apical third; elytra large, wider than long, with the suture much longer than the prothorax and similarly rather shining, with the distinct asperate punctures not very dense; abdomen as in klimschi and galvestonica; mesosternal process extending to apical fourth of the coxæ, moderately wide, rounded at tip and separated by only its own width from the large triangular metasternal projection. Length 2.6 mm.; width 0.75 mm. Texas (Austin). |
Also represented by the female but to be known readily by the more prominent eyes, which are decidedly smaller than usual, although much larger than in Atheta, and by the shorter and more transverse prothorax.
| Atheta (Stethusa) canonica n. sp.—Very similar throughout in form, coloration and sculpture to affluens but a little smaller and less stout, the head just visibly larger and with the similarly large eyes slightly less convex; prothorax almost similar but rather shorter, more impressed along the median line posteriorly; elytra similar but shorter, strongly transverse; abdomen with thinner and deeper side margins, paler basally and at apex, the sixth tergite (♂) with the truncate median part at apex not projecting behind the lateral teeth but very much wider than in affluens, being separated from each of the teeth by a space very much narrower than its own width, and |
