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The synonymical bibliographies of each of the species here treated is sufficient guide to all but a few articles, references to which have been made in the preceding pages.

. 1877a. Beitrage zur Naturgeschichte der Cynipiden. Deut. Ent. Zeit., XXI, pp. 209-248.

1877b. Lege-Apparat und Eirlegen der Galiwespen. Idem, XXI, pp. 305332.

1881. Ueber den Generations-wechsel der Eichen Gallwespen. Zeitschr. f. wissensch. Zool., XXXV, pp. 151-246.

1881. La G6neration Alterante chez les Cynipides. Lichtenstein trans., edit., and publ. Montpellier.

1894. Alternating Generations. Straton trans. and edit., Oxford, Clarendon Press.

1864. [Communication to meeting of July 11, 1864.1 Proc. Ent. Soc. Phila., III, pp. 197, 198.

1873. On the Habits of Certain Gall Insects of the Genus Cynips. Can Ent., V, pp. 91-94.

de. 1819. De Animalibus, I, De Salpa. Berlin.

1840. Ueber die Familien der Gallwespen. Zeitschr., f. d. Ent., II, p. 176.

1882. Alternate Generation in Cynipidae. Psyche, III, pp. 328-329. 1910. The Insect Book. New York, Doubleday, Page & Co., pp. 53-55.

, J. 1881. (Cf. Adler and Lichtenstein.)

, C. R. 1861. [Concerning the sexes of Cynips.1 Proc. Acad. Nat. Sci. Phila., July 1861, September 1862.

1865. Contributions to the Natural History of the Cynipidee of the United States and of their Galls. Proc. Ent. Soc. Phila., IV, pp. 331-380.

, C. V. 1873. Controlling Sex in Butterflies. Amer. Nat., VII, pp. 513-521.

1895. Alternating Generations. Science, N. S., I, pp. 457-463.

1864. On Dimorphism in the Hymenopterous Genus Cynips with an Appendix. . etc. Proc. Ent. Soc. Phila., II, pp. 443-500.