10' 



(^vXomalagisfs * 



AND 



^^^. 



'^^ 



JOURNAL OF VARIATION. 



Vol. X. No. 11. 



November 15th, 1898. 



Aberration of Euchloe cardamines. 



Bv E. H. TriOKXniLL. 





Upperside and underside or aberration of Euchloe cardamines. 



The abcrratiou of PhicJdoi- caidiuiiincs, which the above rcproduc- 

 tiou, from a photoijrai)!), represcuts, was captured iu j\Iay hist, iu the 

 ueiylibourhood of Boxv.'orth, Caiul)ridgeshive. The insect is iu luauy 

 ways a remarkable one, more especially, perluijjs, from the asymmetrical 

 coudition of the black markings, which make it so striking and cou- 

 spicuous, and which are so unusual in specimens of this si)ecies. 



The butterfly is a female, and looks as if it had been drawn through 

 an ink-pot, so dull and smooth are the abnormal dark parts of the wings, 

 but, under a microscope, the blackened scales are seen to be quite 

 similar in general appearance to the white ones ])y which they are 

 sun^ounded, and, at the Ijase of the wings, the long pale scales lie over 

 the darkened ones in quite a normal manner. 



The right fore-wing is entirely blackened excei)t along the costa, 

 which is normal, and there are two or three slender lu'oken whitish 

 streaks running through the discoidal cell to the outir nuirgin, another 

 short marginal one is placed just above the anal angle. The outer 



