1 68 LEPIDOPTERA. 



Under side of the fore wings similar to the upper, but with 

 the nervures very faintly indicated, the hind margin much 

 paler, and a row of small silvery spots from the apex parallel 

 with the margin. In some specimens, two larger, faintly 

 silvery, spots appear a little further from the apes. Hind 

 wings dusky green, with the nervures yellowish ; the silvery 

 spots placed as in A. Adippc, but a large yellowish spot near 

 the middle, and a broad band of the same colour, devoid of 

 spots, before the hind margin ; the silvery marginal crescents 

 are internally edged with green ; margin yellowish, with two 

 reddish lines. 



The male is tolerably constant in colour, but the female 

 varies greatly in the degree of suffusion of dark or black scales 

 on the upper side, some of those from the west of South Wales 

 and from the north of England and Scotland having an abun- 

 dant steely-black irroratiou. Mr. Goss has one such also from 

 the New Forest. One from the north of Scotland, in Mr. C. A. 

 Briggs's collection, is, however, clouded all over with grey. 



As in the allied species, strange aberrations occur. Mr. 

 S. Stevens, who is remarkably rich in this group, has several 

 in which the spots are elongated into blotches, and removed 

 from their usual places nearer to the hind margin, which they 

 sometimes touch. Mr. Briggs has an example in which the 

 spots are joined together into a fascia ; and Mr. R. Adkin one 

 from the north of Ireland, which has the first two spots from 

 the base of the costa fused together into a large uniform 

 blotch. Dr. F. D. Wheeler took one in Noi-folk in which all 

 the spots, except those of the discal cell, are obsolete, but the 

 black colouring is re-arranged upon the nervures, so that the 

 fore wings are strongly rayed with blackish, while the hind 

 have a great black central blotch, white centred, a broad 

 black band, and broadly rayed hind margin ; the silver spots 

 on the hind wings beneath are also elongated, and the margi- 

 nal crescents obliterated. A specimen taken at Cannock 

 Chase by the Rev. C. F. Thornewill is even more extraordinary, 

 being, with the exception of a fulvous spot near the base of 



