. 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. 254 ECONOMIC ENTOMOLOGY CESTRID^ (BOT FLIES) Common Genera and Species: A. Costal vein ends at tip of R4+5, M1+2 is straight not reaching the margin, and cell R5 wide open; squamae small, arista bare; ovipositor elongate.— Gasirophilus (Fig. 160). B. Wings with spots and smoky median cross band.—G. ifitestinalis. Rz*3 R-t-s. Fig. 160.—Venation of wings of horse hot flies {Gasirophilus), 1, G. intestinalis; 2, G. nasali
. 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. 254 ECONOMIC ENTOMOLOGY CESTRID^ (BOT FLIES) Common Genera and Species: A. Costal vein ends at tip of R4+5, M1+2 is straight not reaching the margin, and cell R5 wide open; squamae small, arista bare; ovipositor elongate.— Gasirophilus (Fig. 160). B. Wings with spots and smoky median cross band.—G. ifitestinalis. Rz*3 R-t-s. Fig. 160.—Venation of wings of horse hot flies {Gasirophilus), 1, G. intestinalis; 2, G. nasalis; 3, G. hoemorrhoidalis. BB. Wings without spots. C. Posterior cross-veins (M-Cu) beyond the anterior cross-vein (r-m); legs blackish brown.—G. hcemorrhoidalis. CC. Posterior cross-vein opposite and nearer than the anterior cross- vein.—G. nasalis. AA. Costal vein ends at tip of M1+2; M1+2 with a bend; cell Rb much narrowed or closed. B. Facial grooves approximated below; cell Rs closed and petiolate.— ( 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-. Philadelphia, Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
