Vol. 47, pp. 93-94 June 13, 1934 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON A NEW LISTROCHELUS INJURING PINUS PONDER-OSA LAWSON IN THE ROCKY MOUNTAIN REGION. (COLEOPTERA: SCARABAEIDAE). BY EDWARD A. CHAPIN. The following species, apparently undescribed, has been twice reported as injuring the foliage of Pinus ponder osa Law-son. It is here characterized upon the request of Mr. C. J. Sorenson, of the Utah Agricultural Experiment Station, Logan, Utah. Listrochelus langeri, n. sp. Reddish castaneous, elytra with a white powdery bloom on fresh speci-mens. Superficially resembles L. pulcher Linell but has different secondary sex characteristics. Head moderately coarsely, densely and confluently punctured, transverse ridge on vertex not strongly elevated but sharply defined, clypeus moderately concave, its outer fourth sharply reflexed, very feebly sinuate at middle of anterior margin. Antenna ten-segmented. Pronotum strongly transverse, width across anterior angles noticeably less than that across posterior angles, greatest width just behind the middle, where the side margins are broadly and roundly produced. Mar-ginal bead complete, that across anterior margin broad, that along lateral margins crenulate, surface finely and rather densely punctured except for a small median longitudinal area which is puncture free. Elytra strongly pruinose, sparsely set with short, erect hairs, very finely and sparsely punctured. Sutural interval tumid, discal costae very feeble. Underparts of thorax very densely and very finely punctured, closely set with long, silky hairs. Male. — Antennal club half again as long as the first segment. Third visible abdominal sternite strongly swollen at middle, fourth and fifth sternites slightly concave, posterior margin of fifth with a broad V-shaped notch at middle, sixth sternite with a narrow median longitudinal groove, its posterior margin nearly straight. Pygidium sparsely and finely punc-tured, strongly convex, slightly depressed at middle of base, apical margin 16— Proc. Biol. Soc. Wash., Vol. 47, 1934. (93)
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