Wasps that parasitize aquatic insects are rarely encountered in collections of stream insects. However, in 1988 it was reported by Resh & Jamieson that an aquatic moth (P. confusalis) was parasitzed by an aquatic wasp (T. pilosa) in Owl Creek, Missoula County, Montana. In the summer of 1993, I worked with Resh & Jamieson as they aimed to 1) describe the biology of the parasitoid T. pilosa, and 2) document the distribution of T. pilosa beyond Owl Creek through surveys conducted in the Clearwater River drainage system of western Montana.


Vincent Resh, PhD, University of California – Berkeley | Berkeley, CA


habitat surveying and population sampling


Jamieson, W. & Resh, V.H. (1998). “Biology Of Tanychela pilosa (Hymemoptera: Ichneumonidae), A Parasitoid Of The Aquatic Moth Petrophila confusalis (Lepidoptera: Pyralidae).” Entomological News, 109, pp. 329-338.