Size: ~ 5-6 mm       

Seasonality: Most common between April and September

Distribution; SD-NM, MT-BC, WA-CA

Information: Individuals in this tribe are often seen in the galleries of bark beetles and it is believed that they eat the bark beetle larva. This species is found under bark and is attracted to ultraviolet lights. 

Description: Body; Rectangular, elongate, maroon to dark maroon, appendages red-orange. Pronotum square, lateral margins pronounced. Pronotal hind angles 90 degrees but rounded, pronotal front angles acute, forming a slight point. Pronotum of female with two carinae that start parallel with the lateral margins but then curve out and then back in, and two small, flattened humps in between them. The carinae protrude slightly past the pronotal apex and over the head. Pronotum of male with the same curved carinae along with two large horn-like lobes in between them. Scutellum rounded, ovular. Elytra smooth with very shallow striations. Elytral coloration gradates from maroon at the elytral base to black at the elytral apex. The shape of the wings can sometimes be seen through the elytra. Ventral surface black and red-orange, very smooth. Prosternum with many tiny punctures. Antennae: clavate, 11 segments and a 3 segmented club. Tarsal formula: 4-4-4.