412 JOHN H. GEROULD 



Hawkes, O. a. M. 1916 On the factors which determine the cocoon colour 



of Plusia moneta and other Lepidoptera. Trans. Entom. Soc. London, 



1916, pp. 404-411. 

 Hopkins, F. G. 1894 The pigments of the Pieridae. A contribution to the 



study of excretory substances which function in ornament. Proc. 



Roy. Soc. London, vol. 57, pp. 5, 6. 



1896 The pigments of the Pieridae: A contribution to the study of 



excretory substances that function in ornament. Philos. Trans. Roy. 



Soc. London, vol. 186, pp. 661-682. 

 Mayee, a. G. 1896 The development of the wing scales and their pigment in 



butterflies and moths. Bull. Mus. Comp. Zool., vol. 29, pp. 209-236, 



7 plates. 

 MoEGAN, Sturtevant, Muller, Bridges 1915 The mechanism of mendelian 



heredity. New'York: Holt & Co. 

 Palladin, V. I., AND Livingston, B. E. 1917 Plant physiology. Blakiston, 



Philadelphia. 

 PouLTON, E. B. 1885 The essential nature of the colouring of phytophagous 



larvae and their pupae: with an account of some experiments upon 



the relation between the colour of sych larvae and their food-plant. 



Proc. Roy. Soc. London, vol. 38, pp. 269-315. 



1893 The experimental proof that the colours of certain lepidopterous 



larvae are largely due to modified plant pigments derived from food. 



Proc. Roy. Soc. London, vol. 54, pp. 417-430, pi. 3-4. 

 Przibram, H. 1913 Griine tierische Farbstoffe. Pfltiger's Archiv fiir die 



gesamte Physiologic, Bd. 153, S. 385-400. 

 RiDGEWAY, R. 1912 Color standards and color nomenclature, pp. 1-42, 53 



colored plates. Washington, D. C, pub. by the author. 

 Steche, O. 1912 Die 'secundare' Geschlechtscharaktere der Insekten und das 



Problem des Geschlechts. Zeitsch. fiir indukt. Abstammungs- und 



Vererbungslehre, Bd. 8, S. 284-291. 

 ToYAMA, K. 1912 On certain characteristics of the silk-worm which are appar- 

 ently non-mendelian. Biol. Centralbl., Bd. 32, S. 593-607. 



1913 Maternal inheritance and mendelism. Jour. Genetics, vol. 2, 



pp. 251-404, pi. XX. 

 Ude, H. 1919 On the relations between blood color and cocoon color in silk- 

 worms, with special reference to Mendel's law of heredity. Genetics, 



vol. 4, pp. 395-416. 

 Urech, F. 1893 Beitriige zur Kenntnis der Farbe von Insecktenschuppen. 



Zeitsch. wiss. Zool., Bd. 57, S. 306-384. 

 West, G. S. 1904 The British freshwater Algae. Cambridge Univ. Press. 

 WiLLSTATTER, R., UND Stoll, A. 1913 Untcrsuchungen uber Chlorophyll. 



Berlin. [Summary of numerous earlier publications by Willstatter 



and associates.] 



