Canadian Forest Service Publications
Flight-muscle degeneration in spruce beetles, Dendroctonus Rufipennis (Coleoptera:Scolytidae) 1972. Gray, T.G.; Dyer, E.D.A. Journal of the Entomological Society of British Columbia 69: 41-43.
Issued by: Pacific Forestry Centre
Catalog ID: 18868
Changes in width of an indirect flight muscle, the lateralis medius, were measured at various stages of adult life of D. rufipennis. This muscle degenerated in both female and male spruce beetles after flight and attack on the host. Flight muscles of young adults that emerged in late summer to enter hibernation were smaller than those of beetles taken in spring flight. Young beetles entering hibernation did not disperse by flying, but dropped or crawled to the bases of trees, in which they had developed, and burrowed into the bark.