A large yellow/green scarab with no elytral markings. Elytra has irregular rows of punctures. (2)
Range
e. US to SK, AZ, NV - Map(2)(3)(4), rare in the sw US
Habitat
Deciduous forests and woodlands, adjacent fields
Season
mostly Apr-June (BG data)
Food
Adults feed on foliage of oak, poplar, hickory, pear, maple, cottonwood, willow and sweetgum. (3)
Life Cycle
Female scatters eggs on soil near a tree. Larvae burrow to reach their food source, rotting logs and roots. They pupate at the end of one or two years in earthen cells.
Young R.M. (2002) A new Cotalpa Burmeister taken on post oak in eastern Texas with notes and a key to species in the genus (Scarabaeidae: Rutelinae). Coleopterists Bulletin 56(4): 473-479. (6)