Form strongly elongate, parallel, moderately convex. Color blackish piceous. Integuments not at all alutaceous, strongly shining throughout. Head and thorax moderately finely and not sparsely punctured ; elytra punctured as given in the synopsis. Head scarcely more than one-half the width of thorax, less than twice as wide as long. Preocular lobes prominent, arcuate, oblique; clypeal suture not distinguishable. Antennae very long, considerably sur- passing the anterior coxae. Thorax twice as wide as long; apex scarcely at all emarginate; sides strongly arcuate and rather strongly convergent anteriorly; posterior angles rounded; base not margined; a median fine line, abbreviated at either end, slightly impressed on the disk. Base slightly impressed either side; sides feebly explanate; side margins finely reflexed. Elytra as wide as thorax, two and one-half times as long, three-fourths longer than wide; sides parallel to near the apex; apices broadly subtruncate, suture feebly elevated close to the apex. Length 6.75—7.75 mm. width, 2.75-3 mm.. Male.—Densely pubescent spots on the fourth and fifth ventral segments about one-seventh the width of the segment.
- Type.—Male. Paradise, Arizona. (H. H. Kimball Coll.), Collection of the Bureau of Plant Industry, Harrisburg. Pennsylvania.
- Allotype.—6,000 feet. Mount Washington. Nogales, Arizona, J. A. Kusehe, July 1919-8. Collection of E. C. Van Dyke.
- Paratype.— (Male) California Collection of (lias. Schaeffer. Two paratypes (male) Oracle, Arizona, 7.7, 9.7. Two paratypes (male) Chiricahua Mountains. Arizona, 2.7, 4.7 (Coll. Hubbard and Schwarz). Collection of the United States National Museum. Paratypes, Cat. No. 26173, U.S.N.M.