. Elementary entomology. Entomology. Fig. 175. Wingless female pea aphis and newly born young. (Enlarged) In the fall true males and females usually appear, and eggs are laid which hatch in the early spring. Most species are wingless until the food supply commences to get short, when the next gen- eration develops wings and migrates to new food plants. Many species have winged generations in the spring and fall, which. Fig. 176. Apple aphis, last stage nymphs of winged females on undersurface of apple leaf migrate to and from the summer food plants to others upon which they feed in fall and sp
. Elementary entomology. Entomology. Fig. 175. Wingless female pea aphis and newly born young. (Enlarged) In the fall true males and females usually appear, and eggs are laid which hatch in the early spring. Most species are wingless until the food supply commences to get short, when the next gen- eration develops wings and migrates to new food plants. Many species have winged generations in the spring and fall, which. Fig. 176. Apple aphis, last stage nymphs of winged females on undersurface of apple leaf migrate to and from the summer food plants to others upon which they feed in fall and spring, and upon which the winter eggs are deposited. Many plant-lice exude an abundance of a sweet liquid. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
