396 ANIMAL AGGREGATIONS 



Piper, C. V. 1897. A remarkable sembling habit of Coccinella transversoguilata. 

 Ent. News 8:49-51. 



PiRSCH, G. B. 1923. Studies on the temperature of individual insects with 

 special reference to the honey bee. Jour. Agric. Res. 24:275-87. 



Pitt, Frances. 1927. Animal Mind. London: Allen & Unwin. 340 pp. 



Plath, 0. E. 1927. Notes on the hibernation of several North American bum- 

 blebees. Ann. Ent. Soc. Anier. 20:181-93. 



Plotnikov, V. I. 191 5. Reports on the work of the Turkestan Entomological 

 Station for 1912, 1913, 1914, and part of 1915. (In Russian.) Tashkent. 

 60 pp. 



. 1924. Some observations on the variability of Locusta migratoria in 



breeding experiments. Bull. Entomol. Res. London 14:241-43. 



1927. Locusta (Pachytylus) migratoria, L. and danica, L. as independent 



forms and their derivatives. (In Russian.) Tashkent. 2)3 PP- 



Plunkett, C. R. 1926. The interaction of genetic and environmental factors in 

 development. Jour. Exp. Zool. 46:181-244. 



Popovici-BAZNOSANU, A. 1921. L'influence de quelques facteurs sur I'accroisse- 

 ment des Gasteropodes d'eau douce. Arch. d. Zool. Exp. et Gen. 60:501-21. 



Prevost, J. L., and J. B. Dumas. 1824. Deuxieme memoire sur la generation. 

 Rapports de Toeuf avec la liqueur fecondante Phenomenes appreciable re- 

 sultant de leur action mutuelle. Developpement de I'oeuf des Batraciens. 

 Ann. Sci. Nat. II 1824: 100-120, 129-49. 



Pyecraft, W. P. 1913. The Courtship of Animals. London: Hutchinson. 

 318 pp. 



Rabaiid, E., 1921. Sur le malentendu entre sociologues et biologistes. Anihro- 

 pologie 31:357-40. 



. 1927. Les rassemblements de males d'Halictes et le phenomene social 



chez les insects. Bull. Biol. France Belg. 61 : 163-186. 



. 1929. Phenomene social et societes animals. Ibid. 63:377-98. 



Rahn, O. 1906. tJber den Einfluss der Stoffwechselprodukte auf das Wachstum 



der Bakterien. Centralbl. f. Bakt. II. Abt. 16:417-29, 609-17. 

 Rau, Phil. 1915. Ability of mud-dauber to recognize its own prey. Jour. 



An. Behav. 5:240-49. 



. 1917. Courtship of Pieris protodice. Ibid. 7:143-44 



Rau, Phil, and Nellie Rau. 191 6. The sleep of insects: an ecological study. 



Ann. Ent. Soc. Amer. 9:227-74. 

 . 1929. The sex attraction and rhythmic periodicity in giant Saturniid 



moths. Trans. Acad. Sci. St. Louis 26:81-221. 

 Rawin, W. 1924. Weitere Beitrage zur Kenntnis der mitostischen Ausstrah- 



limg imd Induktion. Arch. f. mikros. Anat. u. Entw. 101:53-61. 

 Reade, W. W. 1867. The habits of the gorilla. Amer. Nat. 1:177-80. 

 Reaumur, R. 1734-42. Memoires pour servir a I'histoire des insectes. Paris: 



Roret. 2:141-47, 170; 5:667. 



