Adult Bluegrass Bill bugs are gray, brown, or black with a curved snout and a hard body that is about 3/16″ (5 mm) in size.
The Billbug larvae are white with a brown head, legless, C-shaped and about the size of a large grain of rice. Habitat:
In the spring when the temperatures are starting to rise, the adult billbugs can often be seen walking on patios and sidewalks around May –mid June. Lawn damage from an adult billbug usually consists of holes in blades of grass caused by chewing. Damages that are far less serve than what their young larvae can do. The larvae are where the real damage is done. They feed on the grass roots and can easily spread causing large patches of dry looking lawn.