i^o Lloyd's natural history. 



markings are blacker than usual, and on the under side of the 

 hind-wings, which are rather pale, only the three first nervures 

 are dilated and greenish, the rest being short and blackish. 

 P. bryonies, (Ochsenheimer) is of a deep smoky-yellow, much 

 irrorated with black, and with the nervures and spots dilated. 

 It is an Alpine race, of the female, common in the Swiss Alps ; 



Upper side of male. 



but specimens approaching it are sometimes met with in the 

 North of Scotland and in some parts of Ireland. 



The larva is dull green, paler on the sides, and with yellowish 

 stigmata. It is covered with white warts, tipped with black, 

 and tufted with short hairs. It feeds on various Cruciferce, 

 and especially on watercress. The pupa is greenish- yellow, 

 with prominent angles. 



THE DUSKY-VEINED WHITE BUTTERFLY. TIERIS SAEELLIC/E. 



[Plafe LIII. Figs. 4, 5.) 

 Po7it'ia saMUca, Stephens, 111. Brit. Ent. Haust. i. p. 21, pi. 3, 

 figs- 3, 4 (I'^^zy). 

 This is a form of P. 7iapl which occurs in June^ and is not 

 uncommon, but is no longer supposed to be a distinct species. 

 It expands about an inch and three-quarters. The wings are 

 shorter and more rounded than in typical P. napi, the fore- 

 wings approaching those of Euchloe cardamiiies in shape. " It 



