The North American Species in Group VIII of Ips De Geer (Coleoptera: Scolytidae)
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AbstractGroup VIII of North American Ips contains I. interruptus (Mannerheim), I. engelmanni Swaine, I. amiskwiensis G. Hopping, I. sulcifrons Wood, I. pilifrons Swaine, I. yohoensis Swaine, I. tridens (Mannerheim) and I. semirostris G. Hopping. Females of some species have dense brushes of long setae or pads of short pile covering the frontal protuberance. Species are described and a key is given. All of them breed in spruce, six in the boreal forest and two farther south in the Rocky Mountains.
1963 ◽
Vol 95
(10)
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pp. 1091-1096
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1963 ◽
Vol 56
(3)
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pp. 324-330
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1992 ◽
Vol 26
(2-4)
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pp. 129-137
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