26 LEPIDOPTERA. 



Yellowish females with darker iiervures have been taken in 

 Aberdeen, Inverness, Eoss, and Fife ; and at Sligo Mr. Euss 

 has found them of a very pale yellow ground colour, but with 

 tlie nervures above all broadly suffused with grey to their tips, 

 a variation more closely approximating to the form called 

 Brijonicc — which occurs in Alpine districts — than any other 

 yet seen by myself in these islands. A yellow variety, with 

 dark nervures and clouded with grey, was taken in the south 

 of England by Mr. S. J. Capper many years ago. 



Mr. E. C. L. Perkins has recorded that the male of this 

 species has, when alive, a distinct scent of verbena, and this 

 is confirmed by Baron de Selys Longchamps and others, who, 

 however, compare the perfume to lemon-scented mint. 



Larva very similar to that of rapcc, but without the 

 yellow dorsal line. On Nasturtium officinale (watercress) 

 and other Crucifcra; especially such as grow in damp places, 

 but will eat Brassica (cahhage), ffrqwris, Barharca, Cochlearia 

 and other plants. In June-July and August-September 

 I have easily reared a brood upon a bunch of watercress 

 placed in water in a sunny window. The eggs were laid in 

 June, the earliest butterfly appeared within a month, and the 

 remainder by the middle of August, except one which emerged 

 in the following June. 



Pupa very similar to that of rcqM', but greener and less 

 dotted. 



Generally distributed, except that it seems to be absent 

 from the extreme north of Scotland beyond the districts of 

 Eoss and Moray. Widely distributed in temperate regions. 



4. P. Daplidice, Z. — Expanse, 2 inches, white with large 

 central black spot and blotched tip, under side of hind wings 

 with grey-green blotches. 



White, fore wings having a large blackish patch at the 

 apex, broken by several elongated white spots, also a large 

 divided black central spot. Hind wings clouded with the 

 dark markings showing through from the under side, and 



