New distributional records for Coquillettidia perturbans (Walker) (Diptera, Culicidae) in Idaho.

Although the cattail mosquito, Coquillettidia perturbans (Walker) is found in North America (north of Mexico) throughout most of the United States and southern Canada, its distribution in the Rocky Mountain States is not well known and only a few collection records have been reported (Darsie and Ward 2005) (Figure 1 [inset]). Since its discovery in Idaho in Latah County (Stage et al. 1952), all known collections of the species in the state prior to this report have been in the northern panhandle counties of Boundary, Bonner, Kootenai, Latah, and Shoshone, and are within the distribution range reported by Darsie and Ward (2005). In preparation for this note, a review of the culicid collections at the following seven institutions produced no additional Idaho records of this taxon: Albertson College of Idaho (ALBRCIDA), Brigham Young University (BYUC), Utah State University (EMUS), Utah Museum of Natural History (UMNH), University of Idaho (WFBM), Washington State University (WSUC), and Walter Reed Biosystematics Unit/Smithsonian Institution (WRBU). In 2003 and 2004, West Nile virus surveillance in mosquito populations was conducted in the state by the Idaho Department of Health and Welfare with the assistance of seven district health departments, some mosquito abatement districts, and the author. During the two years, token samples of trapped specimens of Cq. perturbans were saved from five counties distant from its known range in the state. All specimens saved were females and collected in CDC miniature light traps supplemented with dry ice. The new Idaho collection records (depicted in Figure 1) are as follows: