. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. Fig. a.—Work of Scolytus rugulosus in twig of apple— natural size. (U. S. Dep't. of Agriculture).. a h Fig. 5—Galleries of Scolytus rugu- losus on twig under bark; a, a, main galleries; h, h, side or lar- val galleries; c, c, pupal cells— natural size—(after Ratzeburg, from U. S. Dep't. of Agricul- ture).. 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 res

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. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. Fig. a.—Work of Scolytus rugulosus in twig of apple— natural size. (U. S. Dep't. of Agriculture).. a h Fig. 5—Galleries of Scolytus rugu- losus on twig under bark; a, a, main galleries; h, h, side or lar- val galleries; c, c, pupal cells— natural size—(after Ratzeburg, from U. S. Dep't. of Agricul- ture).. 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 Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872