NOLIDJE. 191 



also is streugthened with dots, one of which is the third raised 

 tuft, and clouded, on the inner side, with fawn-colour which 

 shades off into the central space ; inside this second line is a 

 faint, indented, additional brownish line, outside it a broad 

 white stripe ; hind margin softly clouded with fawn colour, 

 through which runs a white-margined brown sub-terminal 

 line; cilia whitish, intersected and dashed with bi-own. Hind 

 wings rather broad, rounded, whitish ; hind margin brown ; 

 cilia whitish. Sexes alike. Under side of fore wings brownish- 

 grey with the nervures darker ; of hind wings white, much 

 flecked and dusted with grey ; margin browm. 



Very variable. In some specimens the shading of fawn-colour 

 disappears, leaving the transverse lines very distinct and deli- 

 cate ; in others these also become more or less obsolete, until 

 some specimens are clear, pure white. In the other direction 

 the fawn shades become intensified into broad bands, one 

 occupying the whole middle area of the wing, another the hind 

 marginal space, while the lines and raised spots are darkened ; 

 and all possible intermediate shades occur. Both extreme 

 forms have been reared by Mr. W. H. Tugwell and Mr. Robert 

 Adkin. Abroad our darker varieties seem to be the more 

 constant and typical forms. 



Middle of July to middle of August. 



Larva half an inch long, stout, tapering to the head, which 

 is small, the usual raised spots each with a tuft of radiating 

 hairs, the lowest at the sides having longer hairs, and those of 

 the anal segment much longer tufts, pointing backwards. 

 Head blackish brown with a pink transverse streak; body 

 pink or purplish-pink; dorsal line ochreous-yellow, passing 

 between series of velvety-black wedge-shaped spots in the 

 front of each segment ; subdorsal lines very slender, undu- 

 lating, blackish ; spiracular lines pale yellowish, interrupted, 

 and indistinct; spiracles black; hairs greyish -brown ; legs 

 and prolegs pinkish. (Buckler.) Mr. W. H. Tugwell's 

 description differs a little from this. He says that the general 



