Insect enemies of the pine in the Black Hills forest reserve : an account of results of special investigations, with recommendations for preventing losses . 13 ing and dying standing trees and the stumps of felled ones, and exca-vates a broad, crooked, longitudinal gallery. The eggs are depositedin masses along one side, and when they hatch the Larvae work togetherand excavate a broad chamber, instead of making individual larval bur-rows, as is the rule with most other species. One of the striking pecul-iarities of this insect is the habit of the adult and larva of living inthe quantity of sem
Insect enemies of the pine in the Black Hills forest reserve : an account of results of special investigations, with recommendations for preventing losses . 13 ing and dying standing trees and the stumps of felled ones, and exca-vates a broad, crooked, longitudinal gallery. The eggs are depositedin masses along one side, and when they hatch the Larvae work togetherand excavate a broad chamber, instead of making individual larval bur-rows, as is the rule with most other species. One of the striking pecul-iarities of this insect is the habit of the adult and larva of living inthe quantity of semiliquid pitch or turpentine which accumulates inthe primary gallery and brood chamber. While this beetle is capableof attacking and developing its broods in the bark of a living, healthytree, it seldom causes the death of trees unaided by other insects. Itdoes, however, contribute tothe death of trees attacked bythe pine-destroying and otherdestructive beetles. It is acommon insect in the RockyMountain region and west tothe Cascades. A variety (Den-droctonus valens orientalis) iscommon in the East, attackingin the same manner all of theEastern pines.
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Keywords: ., bookcentury1900, bookdecade1900, bookidinsecp00unit, bookyear1902
