Form slightly elongate, moderately convex. Color blackish pieceous above, dull rufous beneath. Thorax and elytra polished, shining, not at all alutaceous; head finely alutaceous. Head moderately finely and sparsely punctured; thorax as in the key. Elytra with nine rows of coarse punctures, seventh in part composed of fine punctures. Head three-fifths the width of thorax, twice as wide as long. Preocular lobes prominent, subtruncate; clypeal suture distinct laterally. Antennae far surpassing the anterior coxae. Thorax three-fourths wider than long. Apex emarginate ; anterior angles somewhat prominent ; sides arcuate and con- vergent anteriorly ; posterior angles rounded ; sides feebly explanate; base not margined medially; an extremely fine median carina on apical half. Elytra not quite two and one-half times the length of thorax, about one-half longer than wide; sides probably slightly convergent behind the middle (not exactly determinable owing to the parting of the elytra). Sutures scarcely elevated posteriorly -y apices rather obliquely and feebly subtruncate; inner angles unusually broadly rounded. Length, 9.5 mm. ; width, 4.25 mm.
Type.—Female. Ciudad, Durango, Mexico 8100 feet. Forrer. Collection of the British Museum.