LIBRARY

THE ANATOMY OF INSECTS 51
Genitalia. - The genitalia or intromittent organ of the male is more appropriately
termed the :edeagus. It consists in a finger-like invagination of the
ventral integument of the membrane between the ninth and tenth abdominal
segments to receive the terminal section of the ejaculatory duct. The basal
area which unites with the body is known as the proximal portion or tegurnen and
the distal part, called the median lobe, corresponds to the penis in many other
animals. It may be retracted within the tegumen in repose. The redeagus is often
highly differentiated in the various insects and is extensively used by systematists
in separating the species.
SELECTED REFERENCES
AARON, S. F., "The muscular power of insects," Sci. Am. pp. 148-150, Sept., 1932.
BERl-ESE, A., Gli 11Isetti. LorD organizzazione sviluppo, abitudini e rapporti coll'uomo.,
I: x + 1004, 1292 figs., refs. pp. 959-982; II: ix + 992, 895 figs., refs. pp. 897-
922,957-977, Societa Editrice - Libraria, Milano, 1909.
COCKAYNE, E. A., "Gynandromorphism and kindred problems," jour. Gen. 5: 75-128,
pIs. XXI-XXIV, 10 diagrams, 1915.
COMSTOCK, J. H., The wings oj insects, pp. xviii + 430, 427 figs., 1 pI., refs. pp. 417-423,
Comstock Pub. Co., Ithaca, N. Y., 1918.
COMSTOCK, J. H., and J. G. NEEDHAM, The wings oj insects, pp. 1-124,90 flgs., Comstock
Pub. Co., Ithaca, N. Y. (reprinted from Am. Nat. 32: 1898; 33: 1899), 1898-99.
DAs, G. M., "The musculature of mouth-parts of insect larvre," Quart. jour. Microscop.
Sci. 80: 39-80, 12 pIs., 1937.
DEAN, R. W., "Morphology of the digestive tract of the apple maggot, Rhagoletis pomonella
Walsh," N. Y. Agr. Ext). Sta. Tech. Bull. 215: 1-17, 3 pIs., 8 refs., 1933.
FELT, E. P., "Mias tor americana Felt, an account of Pedogenesis," N. Y. St. Entom.
26th Ann. Repl., pp. 82-104, bibliography, 1911.
GATENBY, J. B., "The segregation of the germ cells in Trichogramma evanescens," Quart.
Jour. Micro. Sci. 63: 161-174, 1 fig., pi. 13, 1918.
--, "Polyembryony in parasitic Hymenoptera: a review," Quart. Jour. Micro. Sd.
63: 175-196, pIs. 14-15, 1918.
GOLDSCHMIDT, R., The mechanism and physz'ology oj sex determination (Tr. by W. J.
Dekin), pp. 1-259, 113 figs., Methuen, London, 1923.
--, "Inter-sexuality in Lymantria;' Quart. Rev. Bioi. 6: 125-142, 1931.
HENNEGUY, L. F., Les Insectes. Morphologie ReproducUon-Embryogenie, pp. xviii + 804,
622 figs., 4 col. pIs., refs. pp. 495-756, Masson et Cie, Paris, 1904.
HOLDAWAY, F. G., and H. F. SMITH, "Sex ratio and size of host: Alysia, Braconidre Hym.,"
Austral. jour. Expt. Bioi. Med. Sci. 10: 242-259, 1932.
IMMS, A. D., A general textbook of entomology, ed. 3, pp. xii + 727,624 figs., refs., Dutton,
N. Y., 1934.
--, Recent advances in entomology, ed. 2, pp. x + 425, 93 figs., B1akiston, Philadelphia,
1937.
LOWNE, T., The anatomy, Physiology, morjJhology, and development oj the blow fly, I:
ix + 350, 47 figs., pls. I-XXI, 1890-1892, II: viii + 351-778, figs. 48-108, pIs.
XXII-LII, 1893-1895.
MACGILLIVRAY, A. D., External ins(Jct anatomy, pp. viii + 388, 142 figs., Scarab Co.,
Urbana, Ill., 1923.