“Pronotum: With silvery pubescence; black throughout; punctuation dual, larger punctures moderate in size, dense, and distinctly impressed. Elytra: Dark brown to black, each elytron with orange to reddish humeral marking extending from base of second stria diagonally to past middle at side. With nine rows of punctures, rows six and seven nearly always confused or one or the other much reduced; punctures as large, dense as usual, much finer at elytral apex; inner and outer rows of punctures more or less distinct at apex, usually not clearly meeting. Prosternum: Anterior margin in male with a large sharp spine directed diagonally backward; anterior margin in female produced into a broad, sometimes pointed lobe. Length: 5.0 to 6.0 mm” (White, 1968: 79).
USA: AZ.