Colaspis beetles: Description

Grape colaspis: Grape colaspis, Colaspis brunnea, larva. (Photo Marlin E. Rice)Grape colaspis: Grape colaspis, Colaspis brunnea, larva. (Photo Marlin E. Rice)

Grape colaspis: An adult grape colaspis beetle, Colaspis brunnea.Grape colaspis: An adult grape colaspis beetle, Colaspis brunnea. (Photo Marlin E. Rice)

Iowa colaspis: An adult Iowa colaspis beetle, Colaspis crinnicornis.Iowa colaspis: An adult Iowa colaspis beetle, Colaspis crinnicornis. (Photo Marlin E. Rice)

There are two colaspis beetles in Iowa; the grape colaspis and the Iowa colaspis. The grape colaspis can be found throughout Iowa whereas the Iowa colaspis is more restricted to western Iowa. The mature larvae of both beetles are no longer than 1/4 inch and white in color with a tan head. The larvae also have a slight "c"-shape and have many fine hairs on the underside of their abdomen. The adult grape colaspis is smaller than the Iowa colaspis. Additionally, the grape colaspis has around 8 tan stripes on each elytron whereas the Iowa colaspis has around 4 complete and 1 partial stripe [see photo for comparison].