Canadian Forest Service Publications
North American species in Group I of Ips De Geer (Coleoptera : Scolytidae). 1963. Hopping, G.R. Canadian Entomologist 95(10): 1091-1096.
Issued by: Northern Forestry Centre
Catalog ID: 33311
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Ips concinnus (Mannerheim) and Ips mexicanus (Hopkins) comprise Group I of the genus Ips DeGeer (Coleoptera: Scolytidae). Members of this group have 3 spines on each lateral margin of the declivity and stron~gly arcuate sutures on the anterior face of the antennal club. I. radiatae Hopkins is placed as a synonym of I. mexicanus (Hopkins). I. concinnus breeds in Picea sitchensis in the coastal region from Alaska to southern Oregon. I. mexicanus breeds in various species of pines from Alaska to Guatemala and eastward in the United lStates and Canada to the Rocky Mountains. A key to the species and descriptions are provided.