Catalogue of exhibits of insect enemies of forests and forest products at the Louisiana Purchase Exposition, St Louis, Mo., 1904 . i. Work of Dendroctonus frontalis and Dendroctonus terebrans. a. Dendroctonus frontalis: A. adult; B, pupa: C, larva: D, adult of B. valens; E. larva.—b. : A. tibia; B. tarsus: C. B. B. antenna?: F, G, mouth parts. B. mints: II. Tibia:/, tarsus: J. K. B. M, N, antenna?, all enlarged.—c. Pitch tube made by I), frontalis, naturalsize.—(I. Healing wounds, from living pine tree, made by B. frontalis, reduced.—e. Pupa ea«esof D. frontalis in outer pine bark.—
Catalogue of exhibits of insect enemies of forests and forest products at the Louisiana Purchase Exposition, St Louis, Mo., 1904 . i. Work of Dendroctonus frontalis and Dendroctonus terebrans. a. Dendroctonus frontalis: A. adult; B, pupa: C, larva: D, adult of B. valens; E. larva.—b. : A. tibia; B. tarsus: C. B. B. antenna?: F, G, mouth parts. B. mints: II. Tibia:/, tarsus: J. K. B. M, N, antenna?, all enlarged.—c. Pitch tube made by I), frontalis, naturalsize.—(I. Healing wounds, from living pine tree, made by B. frontalis, reduced.—e. Pupa ea«esof D. frontalis in outer pine bark.—/. B. frontalis: A, B. Longitudinal section of primary gal-leries; C, egg in egg cavity inside of gallery, the latter enlarged, others reduced.—g. Healingwounds in living tree: frontal is: F, B. valens.—h. Work of B. frontalis in pine bark isshown at A. C. B. E. F. G: work of B. terebrans in pine bark at B. II. I: larva at work at B. frontalis and B. terebrans attack spruce. (From Bui. 28, n. s„ Ihv. of Entomology,U. S. Dept. of Agriculture.) Bui. 48, Div of Entomology, U. S. Dept. of Agriculture.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
