156 LEPIDOPTERA. 



preceded and followed by pale j^ello\visli-i)ink clouds ; hiu 

 inari;in softly shaded with smoky clouding, in which is a 

 faintly visible, rippled white subterminal line; extreme hind 

 margin edged with minute black lines; cilia sinoky-grey. 

 Hind wings rather fully rounded, but not elongated, shining 

 greyish-white ; from the dorsal margin arise one or two 

 obscure and partial transverse smoky-brown lines ; hind 

 margin clouded with the same colour, and edged by slender 

 black lines ; cilia smoky-white. Female similar but with 

 simple autenn;e. 



Underside of the fore wings pale smoky-brown, more 

 yellow-brown along the costa, whiter along the dorsal margin; 

 before the middle is a black-brown costal spot, beyond it a 

 similar indication of the commencement of tiie second line. 

 Hind wings smoky-white, dusted with brown; central .spot 

 black, followed by a central transverse line of black dots on 

 the nervures; a fainti'r similar stripe lies nearer the hind 

 margin, which also is shaded with smoky-brown. Body 

 and legs whitish-brown ; tarsi black-brown, barred with 

 yellow. 



Rather variable in the tint of ground colour, from greyish- 

 white to white and to pale grey-brown ; rather more so in 

 the intensity of the ])ur])le colouring and of the black mar- 

 gins of the central band, and verj- decidedly so in its breadth. 

 Dr. -Mason possesses specimens, reared from eggs obtained 

 near JJurton-on-Trent, in which this band is of quite unusual 

 breadth, and the other portions of the fore wings are rippled 

 with dark lines; on the other hand, specimens exist in 

 various collections in which tlic central band is reduced to a 

 mere narrow purple stripe ; two such, in the collection of 

 the late Mr. 1'. liond, iiave also the ground colour nearly 

 white, and .Mr. Sydney Webb has one in which the narrow 

 stripe is hmkdt. Specimens from the Faroes and from 

 Iceland are said to have the central band nearly white. 



On the wing in ^lay and -June, and as a second generation 

 in Autrust or even the end of -Julv. 



