. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. 326 ECONOMIC ENTOMOLOGY covers variable in color—-purple, green or coppery. Often destruc- tive in the West to leguminous crops. June-August. Control.—-Spray with arsenical solution. CUCUJIDiE Saw-toothed Grain-beetle (Silvanus surinamensis Linn.).—A widely distributed beetle, feeding on stored grain and their products, and on starchy goods (Fig. 211). Adult.—-A minute flattened chocolate-brown beetle; margins of thorax with six tooth-like projections; Jfo inch long; two grooves in tho
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. 326 ECONOMIC ENTOMOLOGY covers variable in color—-purple, green or coppery. Often destruc- tive in the West to leguminous crops. June-August. Control.—-Spray with arsenical solution. CUCUJIDiE Saw-toothed Grain-beetle (Silvanus surinamensis Linn.).—A widely distributed beetle, feeding on stored grain and their products, and on starchy goods (Fig. 211). Adult.—-A minute flattened chocolate-brown beetle; margins of thorax with six tooth-like projections; Jfo inch long; two grooves in thorax; head and thorax finely punctate; wing-covers punctured and lined. There may be four generations in a season. Lary^.—Flattened, with transverse, rectangular, yellowish, chitinized spots above; 6 legs; Fig. 211.—The saw-toothed grain-beetle {Silvanus surinamensis): a, adult; h, pupa; c, larva—all enlarged; d, antenna of beetle. {After Chittenden.) Pupa.—White, occasionally enclosed in a delicate cocoon made of particles of food. OSTOMATIDiE = TROGOSITID^ The Cadelle (Tenebroides mauritanica Linn.).—Feeds on stored grain and also on other injurious grain insects. Adult.—Axi elongate oblong depressed beetle, nearly black; elytra longitudinally ridged; head and thorax finely punctate; }i inch long; found in 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- [from old catalog]. Philadelphia, P. Blakiston's son & co
Size: 1843px × 1355px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
