A NEW LOOK AT EARTHWORMS (OLIGOCHAETA: LUMBRICIDAE) IN COLORADO, USA AS HOSTS OF THE CLUSTER FLY POLLENIA RUDIS F. (DIPTERA: CALLIPHORIDAE).

Pollenia rudis (Diptera, Calliphoridae) is a major nuisance insect pest in buildings and other structures during the fall and winter months. Adult flies invade to overwinter and cluster around windows and attics. These flies are parasites of earthworms, but the host worms are very poorly documented across North America. We report the first identification of Aporrectodea trapezoides as the host of Pollenia rudis in Colorado. We report the first two earthworm records for Washington County, Colorado (Aporrectodea trapezoides and Ap. turgida). [ABSTRACT FROM AUTHOR]