60 ONERA A. M. HAWKES 



LITERATURE CITED 



Bateson, William 1892 On variation in the colour of cocoons of Eriogaster 

 lanestris and Saturnia carpini. Trans. Ent. Soc. Lond., part I, pp. 

 45-52. 



Lefroy, H. Maxwell and Ghosh, C. C. 1912 Eri Silk. Memoirs of the De- 

 partment of Agriculture in India. May. Entomological Series, vol. 

 4, no. 1. 



Bird, J. E. 1903 Yellow colouring of cocoon of Plusia moneta, result of moisture. 

 The Entomologist, xxxv, p. 188. Also discussion of the same subject 

 by R. S. Smallman (pp. 217 and 290), and A. Robinson (p. 242). 



