. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. emb A B Fig. 261.—Platygaster. Parasitic body. A, about two days old. 5, three days old. (emb) Embryonic region. i?iu. p) Paranuclear masses. region," later giving rise to the embryos. The remainder of the egg con- taining the polar nucleus constitutes the polar region. Between the first and second days the eggs, five to eight in number, deposited by the parasite in the host become somewhat dispersed t
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. emb A B Fig. 261.—Platygaster. Parasitic body. A, about two days old. 5, three days old. (emb) Embryonic region. i?iu. p) Paranuclear masses. region," later giving rise to the embryos. The remainder of the egg con- taining the polar nucleus constitutes the polar region. Between the first and second days the eggs, five to eight in number, deposited by the parasite in the host become somewhat dispersed throughout the develop- ing host if they were deposited in the host egg. If the eggs were deposited in a well-developed embryo of the host or in a recently hatched host larva^, they become scattered in the body cavity of the host at an earlier hour. The eggs begin to increase in size soon after the first day, and therefore the egg stage may be regarded as past; henceforth the developing structures may be regarded as parasite bodies. These are lodged in the salivary glands, fat, or other host tissue, portions of which soon encompass the parasite bodies. After being more or less surrounded by host tissue, an elaboration of the paranuclear masses in the polar region takes place by the absorption of substances from the host. The polar region, including. 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 Johannsen, O. A. (Oskar Augustus), 1870-1961; Butt, Ferdinand Hinckley, 1899-. New York, London, McGraw-Hill Book Company, inc.
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