SATYRID^. 21 T 



in some cases, only one or two of tliese are visible on each 

 wing, and in others all have become obsolete on both upper 

 and under sides. But all these specimens are of full size, and 

 of rich dark colouring. In the north of England, along with 

 dark full-sized specimens occur also many somewhat paler 

 in colour, both in the dark brown and the tawny portions, 

 in some cases almost to the obliteration of the blotches ; 

 narrower also in the shape of the wings, and altogether of a 

 depauperated appearance, showing that here the species has 

 arrived at the limit at which it is able to exist. All these 

 latter varia:tions may be ranged under the varietal name 

 Cassiope, but no clear line of distinction is obsei'vable ; with 

 the exception of the presence or absence of white dots, the 

 gradations are almost imperceptible. Other aberrations are 

 rare, but specimens have been observed having one or more 

 of the wings of a whitish appearance, as though bleached, 

 from the substitution of white scales. 



On the wing in June and early in July. 



Of the larva very little is known, and no description of it 

 seems to be obtainable. Eggs have been procured from the 

 female butterfly, in confinement, by several observers, but the 

 resulting larvaB, in all cases, died. Mr. Buckler described 

 them when just hatched, " flesh-coloured, with ochreous-flesh- 

 coloured heads ; a faint purplish grey tinge showing through 

 the skin of their bodies." The Rev. J. Hellins was somewhat 

 more fortunate. His larva>, which hatched at the same time, 

 the middle of July, fed on satisfactorily into October, at which 

 time they were nearly half an inch long, when they settled down 

 to hybemate, remained quiescent until February, then began 

 to move about, but soon died. He described the larva when 

 young, "dumpy in figure, stoutest in front, with a round 

 head ; in colour, very pale grey ; the anterior segments with 

 a purplish tinge ; dorsal line a rich yellow ; two yellow lines 

 on the side, and another just above the spiracles, which are 

 black ; the usual spots jet black, furnished with very short 

 bristles ; head brown, granulated all over. In about ten days 



