Published online by Cambridge University Press: 31 May 2012
The genus Gynaephora Hübner (Lepidoptera: Lymantriidae) is represented in North America by two closely related species, Gynaephora groenlandica (Wocke) and Gynaephora rossii (Curtis), whose geographic distributions overlap broadly across the Canadian arctic archipelago (Ferguson 1978; Møllgaard and Morewood 1996). Like other lymantriid moths, females of these species fly little, if at all, whereas males are strong fliers and apparently rely on pheromones to locate mates. Cross-attraction has been observed but there is no confirmed evidence that the two species interbreed. This report describes experiments designed to document reproductive isolation of G. groenlandica and G. rossii at Alexandra Fiord, Ellesmere Island (78°53′N, 75°55′W).