. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. CLASSIFICATION AND DESCRIPTION OK INSECTS ,39 AA. Front wing, with thr« âbliâu. ,, .hr .impl. () BB. Anlenn. 3. or 4-«; wing, .t re,t flat on back; , on gran, hlclcory, ttc, never on ,,. '^'. Fig. 91.âVenation of A/afro- siphum. {Afltr Patch.) Fl<;. 93âVenation of Toxoplrra. (Afltr PaUk.)
. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. CLASSIFICATION AND DESCRIPTION OK INSECTS ,39 AA. Front wing, with thr« âbliâu. ,, .hr .impl. () BB. Anlenn. 3. or 4-«; wing, .t re,t flat on back; , on gran, hlclcory, ttc, never on ,,. '^'. Fig. 91.âVenation of A/afro- siphum. {Afltr Patch.) Fl<;. 93âVenation of Toxoplrra. (Afltr PaUk.) Plant-lice or Aphids are gregarious sucking insects, often abundant occuTT ZTT "' ?'"?''â ""'^ â¢â ""« ""'^'' '"J"^y- Three forms occur. ,. sedentary wingless viviparous agamic , ,. migra- tory winged viviparous agamic females, 3. sexual males and females -tlie females oviparous and wingless and the males winged or 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 : P. Blakiston's Son
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectentomology, bookyear1
