LITERATURE 261 



RooNWAL, 1936. Bull. Ent. Res., XXII., 431. 



Sacharov, 1930. Ecology, XL, 505. 



Salt, 1936. Univ. Minnesota agric. Exp. Sta. Tech. Bull., 116. 



Sayle, 1928. Quart. Rev. Biol., III., 542. 



ScHNAUER, 1929. Zeits. angezv. Ent., XV., 565. 



SCHRADER, 1923. Biol. Bull., XLV., 279. 



Shelford, 1927. Bull. Illinois Nat. Hist. Survey, XVI., 311. 



1929. " Laboratory and Field Ecology." London. 

 Simmons and Ellington, 1925. Journ. Agric. Res., XXX., 845. 

 Taylor, 1927. Journ. Morph., XLIV., 313. 

 Tracer, 1932. Biochem. Journ., XXVI., 1762. 

 Uichanco, 1924. Philipp. Journ. Sci., XXIV., 143. 

 UvAROv, 1928. Trans. Ent. Soc, LXXVIL, 255. 



1931. Ibid., LXXIX., 1. 

 Verguin, 1928. Rev. Zool. Agric. et Appl., XXVIL, 141. 

 Wadley, 1931. Ann. Ent. Soc. Am.., XXIV., 325. 

 Weinland, 1906. Zeits. f. Biol., XLVIL, 186. 

 Werner, 1926. Zeits. Morph. Okol. Tiere, VI., 150. 

 Wigglesworth, 1932. Quart. Journ. Mic. Sci., LXXV., 131. 



1936. Parasitology, XXVIIL, 284. 

 ZwoLFER, 1934. Zeits. angezv. Ent., XXL, 333. 



