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rather well developed, almost three-fourths as wide as the prothorax, the large eyes almost extruding to the base as usual, the antennæ moderately developed, with the penultimate joints slightly wider than long, the last barely as long as the two preceding; prothorax more nearly as wide as the elytra, moderately transverse, parallel with rounded sides but with the base more rounded than usual and with a small rounded discal foveola near the base; elytra very little wider than the prothorax, much longer than in any of the preceding the culture infuscate basally and much longer than the prothorax; abdomen shining, much narrower than the elytra, finely and not closely punctulate, evidently pubescent, the sixth tergite (♂) with the median truncate lobe about as wide as the interval between it and the lateral processes and limited at each side by a strong swelling of the surface, its median part concave; mesosternal process rather than usual, its truncate apex distant from the metasternum by but little more than its own apical width, the metasternal angulation much more rounded at tip than usual. Length 2.0 mm.; width 0.5 mm. Missouri (St. Louis). |
Departs rather radically from the preceding species in its longer elytra, which are however together about a third wider than long, and in recognizable differences in general form and sternal structure.
| Atheta (Stethusa) spuriella n. sp.—Moderately stout, testaceous, the head piceous, the elytra more flavate, the abdomen clouded posteriorly except at apex; sculpture minute and dense, sparse on the elytra; head transversely oval, the eyes not quite so large as usual, separated from the base by nearly two-fifths of their length; antennæ with the outer joints rather stout, decidedly wider than long, the last as long as the two preceding; prothorax as in subdebilis; head, prothorax and elytra increasing in even but gentle ratio in width, the last as in subdebilis; abdomen and sexual characters nearly as in that species, the swellings marking the median lobe of the sixth tergite (♂) continued forward for a rather greater distance as obtuse ridges; sterna nearly similar, the metasternal angle less rounded. Length 2.4 mm.; width 0.6 mm. New York (Catskill Mts.). |
This species and the preceding form a small group of Stethusa, distinguished by a less sharply angulate metasternal angle, not quite so large eyes, rather more transverse antennal joints, longer elytra and more pronounced apical characters of the sixth male tergite. Spuriella differs from subdebilis in its relatively larger head and larger and more incrassate antennæ, among the more obvious characters.
The following species is appended very doubtfully to this subgenus, as it differs markedly in general form and antennal structure, though having the very broad mesosternum:
| Atheta (Stethusa) mendosa n. sp.—Rather stout, moderately convex, not parallel, distinctly shining and very minutely, not closely punctulate, the |
