New distributional records (45) are recorded for fishflies in West Virginia. Thirteen new county records were added for Nigronia serricornis (Say), and 18 new county records were recorded for N. fasciatus (Walker). Eight new county records were added for Neohermes concolor (Davis), while six new county records were noted for Chauliodes pectinicornis (Linnaeus). Following this investigation, the statewide distribution of fishfly species is as follows: Nigronia serricornis (45 counties), N. fasciatus (37 counties), Neohermes concolor (10 counties), Chauliodes pectinicornis (19 counties), and C. rastricornis (3 counties).

Tarter and Watkins (1974), Watkins, et al. (1975), and Dolin and Tarter (1981) have reported distributional records of fishflies for West Virginia. Tarter, et al. (1977) noted seasonal emergence patterns for fishflies in West Virginia. The main objective of this investigation is to report new county records of fishflies for West Virginia.

Three eastern genera of fishflies, Chauliodes Latreille, Neohermes Banks, and Nigronia Banks, are placed in the subfamily Chauliodinae. Generally, larvae of lentic species, C. pectinicornis (Linnaeus) and C. rastricornis Rambur, are found in logs near ponds, swamps, lakes, and oxbows, whereas the larvae of lotic species, N. fasciatus (Walker) and N. serricornis (Say), are found under rocks in streams (Tarter, et al., 1976). Larvae of Neohermes concolor (Davis) are found under leaf litter near spring seeps (Tarter, et al., 1979).

Larval and adult specimens examined for this investigation are deposited at the following institutions and agencies: West Virginia Benthological Survey (WVBS) at Marshall University, Huntington, WV; West Virginia Department of Environmental Protection (WVDEP), Charleston, WV; and West Virginia Department of Agriculture (WVDA), Charleston, WV.