Ataenius pseudocarinator Balthasar 1947

Ataenius vandykei

DESCRIPTION.—Holotype Female (?): Length 3.5 mm; width 1.6 mm. Oblong, convex, moderately shining, head and pronotum dark castaneous, elytra darker, almost piceous, elytra rough, setigerous punctures with very fine, short setae. Head convex, clypeal margin finely reflexed, sharply, triangularly dentate each side of moderate median emargination, sides weakly arcuate to sharply rounded, almost right-angled genae; clypeal surface transversely wrinkled anteriorly, middle of disc narrow, minutely punctate, basal half closely, very finely punctate, the punctures elongate, generally twice their width, tending to form lines toward the sides; front and occiput evenly, densely, rather finely punctate, the punctures round at middle, slightly transversely elongate toward sides. Pronotum 1.5 mm wide and 0.9 mm long, convex, anterior angles rather widely, evenly rounded, posterior angles broadly, evenly rounded from sides into base, base slightly angular at middle, sides and base finely margined, edge with extremely minute, short setae and crenations under high magnification; surface everywhere densely, evenly, very moderately punctate. Elytra convex, 2.2 mm long, 1.6 mm at widest, slightly beyond middle, sides feebly arcuate, humeri sharply dentate, striae fine, moderately deep, deep strial punctures slightly crenating inner margins of the subcarinately convex intervals; the intervals are more or less flattened and alutaceous each side with the convex middle broken into round-to-elongate tubercles by a median row of fine, setigerous punctures, the punctures separated by two to three times their diameters, the setae very short and stubby; apically the striae become wider, the intervals narrow and more sharply convex; the lateral intervals not different. Mesosternum shagreened as usual, surface sculpture fine with very fine, short hair. Metasternum shining, midline strong and deep, disc closely, moderately punctate, finely roughened outward to sides where the sculpture is a little coarser, metasternal triangle transversely elongate, the very fine, rough sculpture within extending out to sides of sternum. First visible abdominal sternum strongly punctate with strong, deep posterior marginal line, next three sterna finely fluted along anterior margin, the last with fluting very long, half the length of the sternum, surface of middle three sterna closely, shallowly, setigerously, moderately punctate, the 5th sternum much more finely punctate, all setae very short and not very conspicuous. Pygidium with fine apical margin, eroded disc finely scabrous. Anterior femora with perimarginal groove, surface roughly punctate. Middle and hind femora with scattered, moderate, finely setigerous punctures, posterior marginal line fine, complete. Posterior tibial apical fringe of seven setae, longer at each side, without accessory spine. Long spur, first posterior tarsal segment, and following three segments combined about equal in length.

TYPE.—USNM 71740.

TYPE-LOCALITY.—“San Berdino [Bernardino] County, California. Collection Coquillett.” The pin also bears the numbers 1804 and 3320, the meanings of which are unknown.

SPECIMENS EXAMINED.—The unique holotype.

DATE COLLECTED.—Unknown.

DISTRIBUTION.—See Figure 5.