The principal habitats of immature Orthopodomyia alba and Orthopodomyi
a signifera are tree holes, though they are occasionally encountered i
n artificial containers. We collected 929 Or. alba and 17 Or. signifer
a from 2 plastic trash cans, 2 scrap tires, and a tree hole. All colle
ctions were made in an urban residential area in central Illinois.