LITERATURE 171 



Speyer, 1920. Ann. App. Biol., VII., 124. 

 Stear, 1928. Journ. Econ. Ent., XXL, 565. 

 Theobald, 1926. Journ. Roy. Ilortic. Soc, LI., 314. 

 Turner, 1918. Journ. Agric. Res., XIV., 135. 



1920. Ibid., XVIIL, 475. 

 Verschaffelt, 1910. Amsterdam, Proc. Sci. k. Akad. Wet., XIIL, 536. 



(English.) 

 WiLLCOCKS, 1916. " The Insect and Related Pests Injurious to the Cotton 



Plant." Cairo. 314. 

 Williams, 1935. Trans. Roy. Ent. Soc, LXXXIIL, 523. 



1936. Phil. Trans. Roy. Soc. B., CCXXVL, 357. 

 Yothers, 1927. Journ. Econ. Entom., XX., 567. 



