P YRA US TW.€—£ OTYS. 221 



faint and cloudy ; between them is often a whitish cloud ; 

 extreme hind margin dotted with brown ; cilia brownish- 

 white. Hind wings rather elongated ; apex bluntly angulated ; 

 hind margin sinuous, brownish-white; a faint brown trans- 

 verse line lies beyond the middle, and a darker cloudy shade 

 alone the hind margin ; cilia dull white. Female similar but 

 rather whiter, especially so in the hind wings ; body shorter. 



Underside of the fore wings smoky-brown, shading more 

 to yellow-brown at the margins ; at the apex are several 

 black streaks, and a row of black dots lies along the hind 

 margin. Hind wings dusky white dusted with brown ; along 

 the hind margin is a series of black dots. Body and legs 

 shining brownish-white. 



On the wing from May till August, probably in a single 

 generation. 



Larva five -eighths to three-quarters of an inch long and 

 rather slender ; head polished, broader than the second, but 

 about as broad as the third segment, pale straw-colour, the 

 mandibles brown and the ocelli darker brown ; body cylin- 

 drical and of almost uniform width throughout ; skin 

 semitransparent ; ground colour pale yellow, but the green 

 internal parts make it appear at first to be of that colour ; 

 dorsal stripe a medium shade of green, edged on each side by 

 a broad whitisli stripe, subdorsal stripes of the same green 

 colour, followed by a whitish line above the spiracles, and 

 then by a waved whitish stripe along the spiracular region ; 

 ventral surface, legs and prolegs green, of the same shade as 

 the dorsal stripe. After ceasing to feed, and before sj)inniug 

 up, it becomes bright brownish-yellow, dorsal stripe browner 

 and the former whitish stripes lemon-yellow. (G. T. Porritt.) 



July and August, on Lastrcea spimdosa, Athyrium filix- 

 fcemina, and f)robably on L. filix-mas, and other ferns. In 

 confinement Dr. Chapman has induced it to feed also on 

 Trifolium filiformc. It lives in a slight web on the under- 

 side of a I'roud. The winter is spent in a strong silken 



