19 



becomes yellow ; such a $ has been figured and described as a separate species, 

 Fatime, by Snellen van Vollenhoven in the Tijdschri/f voor Entofnologie, 1865. 

 When still more advanced, this yellow becomes white; a which has for the 

 greater part already reached this stage has been figured by Dr. Staudinger 

 (Exotische Schmctter/iuge, pi. i 7). In this case the under-side is grey, sometimes 

 of a paler, sometimes of a darker shade, and with black and white spots. In 

 the specimens from the Philippine Islands, of which a separate species, Domitia 

 Felder, has been made, the $ has changed in the same direction but still 

 more as to the colour, so that its upper-side does not only show white spots, 

 but for the greater part is not covered any more by the black and thus shows 

 again the ground colour, which in the meantime has become paler, partly lemon- 

 yellow, partly white. These so strongly deviating 9 have first been taken for 

 a separate species and have been called P. Zamboanga Felder. Tachyris 

 Galea Wall, described from N. India, Pieris Asterope Felder, described 

 from Luzon and Appias Mindanensis Butler also are but synonyma of the 

 same species. 



The metamorphosis seems still to be unknown. 



1 1 . Philonome Bsd. (Pl. I, fig. Sa, b.) 



Boisduval, Spec. Gen. I p. 453 (1836) Pieris Philomone. 



Snell. v. Voll., Mon. d. Pier. p. 21 (1865) „ „ 



This species and the next one are mountain butterflies, of which the former 

 is confined to Java. They are classed among the genus Prioneris Wall. ; 

 against the admittance of this genus, however, as against that of the genus 

 Tachyris, arises with Mr. Snellen the systematic difficulty that it is based on 

 only one sex. In Java Philonome is exclusively common In the surroundings of 

 Lawang (500) in E. J. in the province of Pasourouan and is only now and 

 then found elsewhere. I possess one caught on mount Tjerimai (700) in the 

 province of Tjirebon in W. J., and also one from Banjouwangi in E. J. 



In the Leyden museum there is a specimen from mount Arjuno in the 

 province of Pasourouan in E. J. 



In the Fruhstorfer collection I saw a very light-coloured 9 whose black 

 had also turned paler into brownish. In some specimens the black extends 

 itself in pale black stripes across the discoidal cell, in others this is not the 

 case. The early stages are not known. 



