Scientific note egg raft size and bionomical notes on Culiseta incidens Theobald in western Washington

Beginning in January 2002 and ending in November 2003, data were collected on the size (eggs/egg raft) and occurrence of egg rafts laid by Culiseta incidens within 5 miles of Fort Lewis, WA. Culiseta incidens initiated oviposition in late March to early April and ceased oviposition in September-October. Twenty egg rafts from Culex pipiens, a larval habitat associate of Cs. incidens, were also collected during this study and that information is reported. Culex pipiens initiated oviposition in late May, and termination of oviposition appeared to occur in late August. The range of the number of eggs per raft was 59-329 for Cs. inicidens and 218-413 for Cx. pipiens.