. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Fig. 158.—The black gad fly. {After Carman.) Enlarged. Fig. 159.—The larva or grub of the black gad fly. {After Carman.) Treatment.—Protect work horses with fly-nets; smearing ears, with a repellent solution composed of pine tar i gal., fish oil or crude carboHc acid I qt., powdered sulphur, 2 lb. On the western plains horse flies are very troublesome pests. The most common forms are T. septentrionalis Loew, T. illotus

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. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Fig. 158.—The black gad fly. {After Carman.) Enlarged. Fig. 159.—The larva or grub of the black gad fly. {After Carman.) Treatment.—Protect work horses with fly-nets; smearing ears, with a repellent solution composed of pine tar i gal., fish oil or crude carboHc acid I qt., powdered sulphur, 2 lb. On the western plains horse flies are very troublesome pests. The most common forms are T. septentrionalis Loew, T. illotus O. S., T. hirtulus Bigot, Chrysops moerens Walk., and C fuhaster O. 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 Lochhead, William, 1864-1927. Philadelphia : Blakiston

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919