. The Black Hills beetle. 12 THE BLACK HILLS BEETLE. of gallery can be confused, namely, the mountain pine beetle, which has not as yet been found in the same region. If it should occur, however, the galleries may be distinguished by the smaller size, more. Pig. of the Black Hills beetle {Dendroctonus ponderosx Hopk.). Primary galleries and larval mines in inner surface of living bark: a, entrance and basal chamber; b, ventilating holes in roof of gallery; c, termination. The larval mines radiate from the primary galleries. About one- half natural size. (Author's illustration.) crooked
. The Black Hills beetle. 12 THE BLACK HILLS BEETLE. of gallery can be confused, namely, the mountain pine beetle, which has not as yet been found in the same region. If it should occur, however, the galleries may be distinguished by the smaller size, more. Pig. of the Black Hills beetle {Dendroctonus ponderosx Hopk.). Primary galleries and larval mines in inner surface of living bark: a, entrance and basal chamber; b, ventilating holes in roof of gallery; c, termination. The larval mines radiate from the primary galleries. About one- half natural size. (Author's illustration.) crooked and slightly winding course, and by the fact that they are more commonly met with in the silver pine, limber pine, and lodge- pole pine. Whenever the Black Hills species is found in spruce the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hopkins, A. D. (Andrew Delmar), 1857-1948. Washington, Gov't print. off.
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