364 LEPIDOPTERA. 



greenish brown to the middle, followed by an indented, 

 abbreviated, yellowish white transverse stripe, beyond which 

 the hind margin is broadly brownish grey or greenish grey, 

 and in it is, usually visible, a row of indistinct white dots in 

 faintly brownish clouds. 



Variable in colour, which in some specimens becomes 

 tawny, or even has a faint suggestion of purplish brown in 

 the males, while in the females it sometimes becomes pale 

 ochreous, or even whitish ochreous ; and also in the colour of 

 the margins, which, in some specimens, become distinctly 

 and even broadly blackish brown, while in others they are 

 hardly darker than the ground colour. Broadly speaking, 

 hilly localities seem to produce the darker specimens, and 

 meadows and level ground the paler, but in neither case 

 exclusively. The dark spot near the apex of the fore wings 

 on the upper side is occasionally found very large and dis- 

 tinct, but more frequently extremely faint or almost obsolete ; 

 and this seems to occur as frequently in the tawny or brownish 

 examples as in those which are pale in colour. Mr. C. A. 

 Briggs has specimens in which the fulvous or tawny upper 

 side is broadly dashed with pale drab ; and one having a 

 broad fulvous blotch or streak on the underside of the hind 

 wings, breaking completely through the dark angulated edge 

 of the transverse band. Mr. S. Webb has a very large and 

 beautiful female specimen of a clear yellowish white above 

 and on the underside of the fore wings, having also a large 

 apical spot and the hind wings beneath very dark and 

 strongly marked ; another with the outer half of the same 

 surface of a pale buff, with no trace of the row of white dots ; 

 a third with the same space pale grey, and the row of white 

 spots very distinct, complete, and silvery ; while a fourth is 

 so dark that the transverse pale bar is clouded and indis- 

 tinct. Perhaps the most singular variety recorded is one 

 from Berkshire, having two distinct white-centred black 

 spots on the upper side of the liim^ wings. It appears 

 customaiy in this country to call specimens having the 



