4° LEPIDOPTERA. 



band, deep black, elongated and erect ; just beyond this and 

 still within the baud is a slender whitish rivulet line ; second 

 line composed of dusky atoms placed just beyond the band, 

 parallel with it and only separated by a white line ; hind 

 marginal region dusted with grey-black in blotches above 

 and below the middle, and broadly and beautifully clouded 

 and blotched with rich fulvous or chestnut, through which 

 runs a slender irregular yellowish-white subterniinal line; 

 extreme hind margin edged by short parallel black and 

 white streaks; cilia brownish-white chequered with black 

 spots clouded outwardly, llind wings smoky-white, with a 

 series of partial smoky-brown transverse stripes arising on 

 the dorsal margin, that at the middle of the wing continued 

 as a line of smoky-black dots ; those beyond it massed into 

 a marginal smoky band, interrupted by white dots ; central 

 spot black ; cilia white spotted with black. Female similar. 

 Undersides of all the wings glossy smoke-colour ; costa 

 of the fore wings spotted with black ; discal spot and 

 two following curved lines smoky-black. Hind wings very 

 similar. Body and legs whitish-brown, the latter darker in 

 front. 



Variable in the width of the central band of the fore 

 wings, and in the depth of its colour, it sometimes being 

 partially broken or clouded with tawny and dusted with 

 white; there is also some diversity in the shade of tawny 

 clouding; in Wales both are sometimes very pale. In 

 Scotland the ground colour alone is sometimes very white, 

 but, on the other hand, Shetland specimens are greatly 

 darkened, the central band much shaded with blue-black, 

 and narrow bands near the base and hind margin similarly 

 dark. 



On the wing at the end of May and in June. 



Larva. Head brown, marked with lines of a dingy shade ; 

 on the collar is a blackish spot ; general colour dull yellowish- 

 green ; dorsal line broad, continuous, dull, dingy pui-ple ; 



