. 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. ubr -~ed. -int. Fig. 32. Fig. 33. Fig. 32.—Male reproductive organs of Gryllus pennsylvanicus. T., Testis; Susp., suspensorium of testis; vd., vas deferens; ubr., , accessory glands on surface of seminal vesicle; ed., ejaculatory duct; , spermatophore cup; int., intromittent organ or penis. Fig. 33.—Female reproductive organs of Gryllus pennsylvanicus. Susp., Sus- pensorium of ovaries; O., ovaries;

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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. ubr -~ed. -int. Fig. 32. Fig. 33. Fig. 32.—Male reproductive organs of Gryllus pennsylvanicus. T., Testis; Susp., suspensorium of testis; vd., vas deferens; ubr., , accessory glands on surface of seminal vesicle; ed., ejaculatory duct; , spermatophore cup; int., intromittent organ or penis. Fig. 33.—Female reproductive organs of Gryllus pennsylvanicus. Susp., Sus- pensorium of ovaries; O., ovaries; ov., ovarian eggs; od., oviduct; C cercus; , seminal receptacle; d., duct of seminal receptacle; vag., vagina; be, copulatory pouch; Ovp., ovipositor. follicles of the testes. There are also usually accessory glands which secrete mucus that envelopes the spermatozoa and ova (Figs. 32 and 33)- Parthenogenesis, or reproduction without fertilization, occurs in many insects—in aphids, Cynips, Lasius (Ant), and some 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