Form rather broad and depressed. Color varying from pale ferruginous to blackish piceous. Integuments above finely alutaceous. Head with two or three punctures near eye. Thorax impunctate. Elytra with four rows of coarse punctures, rather widely spaced. Head three-fifths the width of thorax, about twice as wide as long. Preocular lobe somewhat distinct; clypeal suture feebly marked. Antennae short, not surpassing the anterior coxae. Thorax twice as wide as long, as wide as elytra 5 apex feebly emarginate ; anterior angles very broadly rounded; sides rounded and convergent anteriorly; posterior angles broadly rounded; margins finely reflexed; base finely margined medially; a fine median carina behind the middle. Elytra about three-fifths longer than wide, scarcely more than twice the length of thorax, distinctly narrowed posteriorly; apex obliquely truncate; outer angles broadly rounded, inner rather narrowly rounded; suture feebly elevated apically. Length, 6.75- 7.75 mm. ; width, 3-3.5 mm. Male.—Densely pubescent spot at the middle of the fourth and fifth ventral segments, about one-seventh the width of the segment.
- Type.—Male. Allotype and 1 paratype (female), Rincon Mountains, Arizona. July, 1907. Collection of the author.
- Paratype (female). Rincon Mountains, Arizona. July, 1907. Collection of the British Museum.
- Paratype (female). Rincon Mountains, Arizona. July, 1907. Collection of the Academy of Natural Sciences of Philadelphia.
- Paratype (female). Tucson, Arizona. July 21, 1913 (Shreve). Collection of the Bureau of Plant Industry, Harrisburg, Pennsylvania.
- Paratype (female). Huachuca Mountains, Arizona (Palm Coll.). Collection of the American Museum of Natural History, New York.
- Four paratypes (2 males, 2 females). Fort Grant, Arizona. July 12, 15, and 23 (Coll. Hubbard and Schwarz). Collection of the United States National Museum.
- Paratypes.—Cat. No. 26169, N.S.N.M.