PROC. ENTOMOL. SOC. WASH. 108(1). 2006. pp. 131-138 ADULT CADDISFLY (TRICHOPTERA) PHENOLOGY AT THE HANFORD REACH NATIONAL MONUMENT, WASHINGTON STATE Richard S. Zack, David E. Ruiter, Dennis L. Strenge, and Peter J. Landolt (RSZ) The James Entomological Collection, Department of Entomology, Washington State University, Pullman, WA 99164-6382, U.S.A. (e-mail:
[email protected]); (DER) 6260 South Grant Street, Centennial, CO 80121 (e-mail:
[email protected]); (DLS) Battelle Pacific Northwest National Laboratory, Battelle Boulevard, Richland, WA 99352; (PJL) USDA, ARS, 5230 Konnowac Pass Road, Wapato, WA 98951 Abstract. — Adult caddisflies were sampled on the Wahluke Wildlife Area and Saddle Mountain National Wildlife Refuge subunits of the newly created (2000) Hanford Reach National Monument using 15-watt "black lights" from April 2002 through April 2003. A diverse fauna consisting of nine families, 21 genera, and 33 species were collected. Protoptila coloma Ross, Agraylea multipimctata Curtis, Hydroptila xera Ross, Ceraclea alagma (Ross), Nectopsyche lahontanensis Haddock, Oecetis cinerascens (Hagen), and Ylodes reuteri (MacLachlan) represent new records for Washington State. Species com-position and phenology are presented in tabular form. Key Words: Trichoptera, Hanford, survey, Washington State, caddisflies During the period April 2002 through April 2003, entomological survey studies were conducted on the Hanford Reach Na-tional Monument located in south central Washington State. The Monument was cre-ated in 2000 from portions of the Hanford Nuclear Site and is administered by the United States Fish and Wildlife Service and the United States Department of Energy. The Monument includes a variety of sub-units but those surveyed for this study were the Wahluke Wildlife Area and the Saddle Mountain National Wildlife Refuge that are located in portions of Franklin, Grant, and Adams counties that lie to the north of the Columbia River (Fig. I ). Newell et al. (2001) conducted a survey of caddisflies at the two largest spring-stream systems on the Monument — Rattle-snake and Snively Springs. These springs are found in the Fitzner-Eberhardt Arid Lands Ecology Reserve subunit of the Monument, and are situated approximately 20 km from where our studies were con-ducted. Newell et al. (2001) found a total of 26 taxa based on adults but noted that previous benthic studies (Gaines 1987a, b; Gaines et al. 1989, 1992; Newell 1998) had revealed only four genera of caddisflies based on larval collections from the springs. Newell et al. (2001 ) postulated that most of the caddisflies they obtained during their survey work did not originate from the spring systems, but from the nearby Colum-bia River Because of habitat differences found on the Wahluke and Saddle Moutain subunits and their closer proximity to the Columbia River, we decided to undertake a more inclusive study of the Monument in order to verify and add possible new re-cords, as well as verify and add to available phenological data. Site Description Climate at Hanford is best characterized as semi-arid with hot and dry summers and
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