. 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. 89.—Front of head and cauda of two aphids: a, Rhopalosiphiim; b, Aphis. H. Frontal or antennal tubercles with a prominent tooth-like projection on inner side; cauda tapering.— Phorodon. ' See Can. Enl., Vol. 42, No. 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 resem

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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. 89.—Front of head and cauda of two aphids: a, Rhopalosiphiim; b, Aphis. H. Frontal or antennal tubercles with a prominent tooth-like projection on inner side; cauda tapering.— Phorodon. ' See Can. Enl., Vol. 42, No. 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