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Published online by Cambridge University Press:  31 May 2012

Jorge A. Santiago-Blay
Division of Entomology, Plant, and Soil Microbiology, Department of Environmental Sciences, Policy, and Management, University of California, Berkeley, California, USA 94720-3327
Traivis L. Young
Department of Biology, Alabama Arts and Mechanics, Normal, Alabama, USA 35762


Conophthorus Hopkins 1915 cone beetles are among the most damaging pests of pine (Pinus spp.) seed production in North America (Hedlin et al. 1980; Cibrián-Tovar et al. 1986). Current work on cone beetle molecular identification and semiochemicals requires a rapid and reliable method for sexing adult beetles. Head microsculpturation (Schwarz 1895; Wood 1982), overall beetle length, head width, and internal genital structures (or parts of them) visible when extruded through the genital opening (Lyons 1956) have been suggested as characters to sex adult Conophthorus. Herdy (1959) pointed out that abdominal tergite morphology could be used to distinguish males from females. The latter seems to be the most reliable, non-destructive way to sex Conophthorus specimens. Published illustrations (Kinzer and Ridgill 1972) have been found difficult to interpret by many researchers. To increase the reliability in sexing adult Conophthorus beetles, we prepared scanning electron micrographs (SEMs) of the terminal abdominal tergites of adult males and females, which we present here, clearly showing the diagnostic features of each sex.

Copyright © Entomological Society of Canada 1995

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Cibrián-Tovar, D., Ebel, B.H., Yates, H.O. III, and Méndez-Montiel, J.T.. 1986. Cone and Seed Insects of the Mexican Conifers. United States Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, Asheville, NC. 110 pp.Google Scholar
Hopkins, A.D. 1915. A new genus of scolytid beetles. Washington Academy of Sciences 5: 429433.Google Scholar
Hedlin, A.F., Yates, H.O. III, Cibrián-Tovar, D., Ebel, B.H., Koerber, T.W., and Merkel, E.P.. 1980. Cone and Seed Insects of North American Conifers. Canadian Forest Service and Secretaría de Agricultura y Recursos Hidraúlicos, México. United States Department of Agriculture, Forest Service, Washington, DC. 122 pp.Google Scholar
Herdy, H. 1959. A method of determining the sex of adult bark beetles of the genus Conophthorus. Canada Department of Agriculture, Research Branch — Forest Biology Division, Bi-Monthly Progress Report 15(3): 12.Google Scholar
Kinzer, H.G., and Ridgill, B.J.. 1972. A rapid field method for sexing the Ponderosa Pine Cone Beetle. Journal of Economic Entomology 65: 11881189.Google Scholar
Lyons, L.A. 1956. Insects affecting seed production in red pine. Part I. Conophthorus resinosae Hopk. (Coleoptera: Scolytidae). The Canadian Entomologist 88: 599608.Google Scholar
Schwarz, E.A. 1895. Description of the pine-cone-inhabiting scolytid. Proceedings of the Entomological Society of Washington 3: 143145. [Date of issue of this article indicated after the frontispiece as March 28, 1895.]Google Scholar
Wood, S.L. 1982. The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae), a taxonomic monograph. Great Basin Naturalist Memoirs 6: 11359.Google Scholar