. Annual report of the State Entomologist of Montana . Fig. 8. The Fruit-tree Bark-beetle: a. adult beetle; b. same in profile; c,pupa; d, larva—all magnified about ten times. (Chittenden, Circular 29, , ^^y. of Entomology, U. S. Dept. or Agr.) 160 MONTANA EXPERIMENT STATION. diverge, however, and increase in size as the growing larva gnawsits way away from the main burrow. Most trequently the insectlives in such numbers, with its larval galleries so closely packed to-gether and so much confused with others that it is with difficultythat individual galleries can be distinguished. The
. Annual report of the State Entomologist of Montana . Fig. 8. The Fruit-tree Bark-beetle: a. adult beetle; b. same in profile; c,pupa; d, larva—all magnified about ten times. (Chittenden, Circular 29, , ^^y. of Entomology, U. S. Dept. or Agr.) 160 MONTANA EXPERIMENT STATION. diverge, however, and increase in size as the growing larva gnawsits way away from the main burrow. Most trequently the insectlives in such numbers, with its larval galleries so closely packed to-gether and so much confused with others that it is with difficultythat individual galleries can be distinguished. The larvae transform to pupae at the end of their galleries. Thenumber of generations varies in different parts of the country be-tween one or two and four. The species is a fairly common one in the eastern part of theUnited States and may appear on nursery stock shipped in for plant-ing in Montana.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1903
