Johnston et al. 2015
Diagnosis: Body elongate, large (>25mm). Pronotum strongly arcuate laterally, narrowing posteriorly, anterior angles slightly produced, rounded. Prosternum extending posteriorly of procoxae, without distinct process. Profemora spined in males, unspined in females, probasitarsis thickened beneath, with bulbous lobe projecting antiorly from plantar surface. Elytra parallel sided to slightly inflated posteriorly in females, noticeably sculptured with either muricate to bluntly tuberclate or with deeply sulcate striae. Distribution: Coconino, Navajo, Apache, Yavapai, Gila, Maricopa, Pinal, Pima, Santa Cruz, Cochise counties, AZ. Broadly distributed from TX north to NB, west to British Columbia, Canada, south to Durango, Mexico.