Form somewhat elongate, slightly depressed. Color blackish piceous, margins paler. Integuments above finely alutaceous, some- what feebly shining; head and thorax finely and rather sparsely punctured; elytra punctured as given in the synopsis. Head threefifths the width of the thorax, twice as wide as long. Preocular lobes not prominent ; clypeal suture very indistinct. Antennae rather long, surpassing considerably the anterior coxae. Thorax twice as wide as long, as wide or wider than elytra. Apex feebly emarginate, anterior angles rounded; sides broadly arcuate and convergent anteriorly, posterior angles rounded; sides rather broadly explanate with margin finely reflexed. Base finely margined medially, a fine and feebly impressed median line anteriorly, a very faint and short carina near the base. Elytra nearly two and one-half times the length of the thorax, slightly more than one-half longer than wide; sides distinctly convergent behind the middle, suture broadly and feebly elevated on apical half; apices obliquely truncate, with the angles rounded as usual. Length, 7.25 mm. ; width, 3.5 mm.
Type.—Female. Santa Cruz Village, Cobabi Mountains, Arizona. August 10-12, 1916. 32° 1' N., 111° 54' W., about 3,100 feet (Lutz) collected at light. Collection of the American Museum of Natural History.