PTEROPHORID^—PLATYPTILUS. 353 



anal angle very prominent ; pale greyish-drab or whitish- 

 brown ; before the middle is a brown streak near the dorsal 

 margin, pointing toward a brown spot near the costa ; just 

 beyond the middle is a black dot on the dorsal margin, and 

 beyond it a large brown triangle, the base of which is along 

 the costa, and which extends half way across the wing just 

 behind the fissure, where two black dots lie close together ; 

 along the hind margin is a dark brown line ; cilia white. 

 Hind wings fully divided into three finger-like sections, 

 glistening pale purplish-brown, with long cilia of the same 

 colour, except on the hind margin of the third, where 

 the cilia ai-e white with a brown dot before the middle. 

 Legs long and thin, white, repeatedly clouded with brown. 

 Female very similar, but larger, and the abdomen thicker. 



Underside of the fore wings dark purplish-brown to the 

 fissure, thence pale ochreous with white dashes, margin 

 black-brown. Hind wings smoky-brown ; body dull brown. 



Vai'iable in size, and in the shade of white, or brown, 

 gi'ound colour. 



On the wing at the end of May and in June, and as a 

 second generation in July and August, or in the north in 

 the beginning of September, 



Larva plump, almost naked ; head shining pale brown or 

 black ; dorsal plate black ; general colour greyish-white, 

 or greenish-white ; dorsal line a broad stripe, rosy-red or 

 purplish-red ; subdorsal and spiracular lines narrower, of the 

 same colour ; raised dots shining black ; spiracles and legs 

 black. 



April and May on coltsfoot (Tiissilago farfara), eating out 

 the substance of the bud or flower, or the base of the seed 

 vessel, and causing the flower stalk to droop ; a second 

 generation feeds in June in the upper part of the root of 

 the same plant ; or on the undersurface of the large leathery 

 leaves, gnawing the parenchyma under the white down, but 

 not cutting through the leaf. 



VOL. IX, Z 



