of the Group CaWidryadea. 413 



seems also to be a tendency to reduction in size m both sexes 

 as well as of the black and orange markings on the upper 

 surface of the female. 



Wet phase. Dry phase. 



P. cipn's, Cram. P. argante, Fabr. 



In the dry phase the black border on the upper surface is 

 much reduced, often only indicated by dots in the male; the 

 silver spots disappear from the under surface of the male 

 and the pearly-])urplish and bluish patches from the same 

 surface of the female. 



In the insular P. rorata^ Butl., there appears to be only 

 one phase. 



Aphrissa, Butl. 



Of A. neli'is, Boisd., A. Wallaceij Feld,, A. jada, Butl,, 

 A. orhiSy Poey, A. hartonia, Butl., and A. Godariiana, Swains., 

 I know only one phase, A. hartonia and Godartiana are 

 insular forms somewhat nearly related, and will doubtless 

 be regarded as subspecies of one type by lepidopterists of 

 the present day; they are, however, absolutely constant to 

 locality, which is more than can be said of the myriad 

 individual sports and aberrations now being raised to equal 

 rank with insular forms by the advocates of trinomial 

 nomenclature. 



Wet phase. Dry phase. 



A. statira, Cram. A.fahia, Fa.hT.=Boisduvalu, Feld. 



There are t^o very pretty intermediate males from Panama 

 in the British Museum collection. 



A.Jaresia, Butl., is evidently a highly coloured form of tlie 

 female (wet phase) : an integrade from this to the normal 

 female is in the Museum collection. 



Catopsilia, Huljn. 



W'et phase. Dry phase. 



C. pomona, Fabr. C. crocale, Cram. 



C. jjhlegeuSy Wall., and C. heera, Swinh., are intermediate 

 wet phases; and C.j^igurtha, Cram., jiigurihina, Godt., and 

 enden-, Boisd., intermediate dry phases. It is possible that 

 the numerous intergrades between the extreme piiases of this 

 butterfly are due to the fact that evolution has, in this case, 

 not limited the phases to their proper seasons ; so that typical 

 C. pomona and crocale may be taken in copula. 



(J. fiava^ Butl., is a dry phase from the CVdebes; the wet 

 phase resembles C. pomona^ excepting that the discal markings 



