Vol 88 (1991)

Journal of the Entomological Society of British Columbia


Cover Page
COVER: An adult female Hyalophora euryalus kasloensis (Cockerell) (Lepidoptera: Saturniidae) drawn with pen and ink by Sheri Giesbrecht from specimens reared by Dean Morewood. The ceanothus silkmoth, Hyalophora euryalus (Boisduval), is native to the Pacific coast and western mountains of North America from Baja California to British Columbia. Despite any nominal preference for ceanothus, larvae of this species have been reported to feed on a wide variety of broad-leaved trees and shrubs and at least one conifer. In mid to late summer the larvae spin sturdy tear-drop shaped cocoons, usually attached at the side to twigs of their host plant, within which they spin a second cocoon. After overwintering as diapausing pupae, the large reddish brown moths emerge from their cocoons mainly in May and June, and dedicate their one week adult lifespan to reproduction. The form known as H. e. kasloensis is found in the interior of B.C. and northern Washington and Idaho and shows a distinct larval phenotype, but its taxonomic status has yet to be firmly established (see p. 31).