. The biology of insects. Insects -- Biology. REPRODUCTION AND HEREDITY 145 In every case we find the form and action of an insect's ovipositor suited to the position in which eggs have to be placed. The long ovipositor (Fig. 36, A) of a female phasgonurid grasshopper enable her to bury her eggs deep in the ground, and the long tapering telescopic abdomen of a female crane-fly or carrot-fly enables her to achieve the same result on a smaller scale. The serrated processes of a sawfly's or a cicad's oviposi- tor serve to cut in- cisions in plant tissues, while the dart-like egg-laying organ of Â
. The biology of insects. Insects -- Biology. REPRODUCTION AND HEREDITY 145 In every case we find the form and action of an insect's ovipositor suited to the position in which eggs have to be placed. The long ovipositor (Fig. 36, A) of a female phasgonurid grasshopper enable her to bury her eggs deep in the ground, and the long tapering telescopic abdomen of a female crane-fly or carrot-fly enables her to achieve the same result on a smaller scale. The serrated processes of a sawfly's or a cicad's oviposi- tor serve to cut in- cisions in plant tissues, while the dart-like egg-laying organ of » an ichneumon fly pierces the body-wall of a caterpillar, and prepares for the life of her larva as an internal parasite. Be- sides laying the eggs the female often fixes or protects them by a hardened fluid Fig secretion of glands opening into the vagina. To such pro- tective action further reference will be made a later chapter. m 36.âA, Hinder Abdominal Segments (7-10) and Ovipositor of Longhorned Grasshopper (Conocephalus), lateral view. X 3. B, Diagram of Hinder Abdominal Segments (6-10) and developing Ovipositor of a typical female insect, c, cerci; v, vulva; ga, processes (gonapophyses) of eighth segment; gb, inner and gc, outer processes of ninth segment. After R. E. Snodgrass (Anatomy of the Honey Bee, (p. 302). â '°"- The sperm-cells are developed, as already mentioned, in the testes of the male, whose abdomen contains on either side in the dorsal region a testis which corresponds to the female's ovary, and is composed, like that organ, of a number of tubes which open into a duct called, in the male, the L. 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 Carpenter, George H. (George Herbert), 1865-1939. New York, The Macmillan Company
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