65 



that we must, without a doubt, attribute it to the same influence, still unknown 

 to us; a similar influence to that which in South America among many species 

 of families, as those of the Acraeidae and Pieridae, has caused the oblong shape 

 of the wing which is peculiar to that region, but which does not occur among 

 species not living in South America, and neither among some species which 

 do live there, but which have not yet proceeded so far as regards that process 

 of changing. This gives a strong support to the aforesaid declaration of 

 Prof. Weismann that alterations of colour are really nothing but alterations of 

 form. Also among some Papilionidae and Nymphalidae of the Indo-Australian, 

 zone, the process of colour-evolution occurs in the same manner; the strong 

 resemblance between such butterflies, especially between the Nepheronias and 

 some Danais species, which are very common in that region, explains it 

 superficially as mimicry. 



I. Valeria Cram. (PI. IV fig. 5, a, b, c.) 



Cramer, //. 133 //. 85 A (1779) Pap. Valeria. 



BorsDUVAL, Spec. Gtfn. I p. 444 {nee. var. A) (1836). Pieris Valeria. 

 Snell. V. VoLL., Moti. d. Pi£r. p. 56 {nee. vai'.) (1836) „ „ 



Butler, CisL Ent. ///. 431 (1879) Nepheronia Lutescens. 



Distant, Rhop. Mai. />. 320//. 26 >^. 14 (1882 — 86) 



Staud., Exot. Sclwi. p. 36 pi. 2\ (1884 — 88) . . . Eronia Valeria. 



Bingham, Fauna of Brit. Indiap. 2 8o/>/. 1 8 fig. 1 24 ( 1 907) Pareronia Pingasa. 



W. J. Batavia (3 — 14) and also in the forest of Pademangan which is 

 situated still lower; Buitenzorg (265), the Gedeh and the Wajang mountains 

 (1650). I received it from mount Tjerimai (700) in the province of Tjirebon. 



C. J. Touban (2) on the north-coast, Bojonegoro (258), Ambarawa (500). 



E. J. Kediri (64) and on mount Arjouno. From the island of Bawean I 

 received a particularly small dwarsfish cf. 



A butterfly with a powerful flight, whose eyes during life are bluish grey. 

 In the c/' the white has become bluish in consequence of some structural cause. 

 In the ? the black has sometimes turned paler into a lighter brown. By the 

 unequal progress of the process of colour-evolution there occur both white and 

 yellow v; BoisDUVAL already observed this. Between those 9 there also exist 

 specimens of a transition colour. I add here good figures of the (^ as well 

 as of both forms of colour of the ?. The Indian form, figured by Bingham 

 on pi. 18, fig. 125 only differs by an increase of the black. The form 

 Lutescens also occurs in Java. 



