TRIFJD.E. 85 



which are white streaks from the nervures ruiiuiug into the 

 cilia, these last being purplish-drab clouded with black-brown. 

 Hind wings small, the apex rather angulated and produced ; 

 hind margin scalloped or roughly crenulated ; colour yellow- 

 ish-white ; a broad smoky-brown cloud divided by whiter 

 nervures lies along the hind margin, which is scalloped with 

 a smoky-brown line ; cilia yellowish-white. Female larger, 

 with broader and also more pointed fore wings, which are 

 pale drab, the dotted lines more conspicuous ; the nervures 

 whiter, the median edged with brown lines, and the angle 

 where it divides lined with black -brown, but the indications 

 of stigmata less noticeable ; the smoky-brown cloud on the 

 yellowish- white hind wings smaller and more faint ; antennte 

 threadlike ; abdomen very stout, with a small, compressed 

 anal tuft. 



Underside of the fore wings yellowish-drab, a fluffy mass 

 of long hair-scales filling the discal cell ; beyond this is a 

 large smoky-black cloud divided by the pale nervures ; costal 

 and hind marginal regions dusted with smoky-brown ; a black 

 spot in the end of the discal cell ; beyond it, on the costa, 

 is a black spot followed by three yellowish-white dots. Hind 

 wings yellowish-white ; the costal and hind marginal regions 

 dusted with smoky-brown and the former also with reddish- 

 brown ; central spot large, black ; beyond it is a series of 

 blackish streaks on the nervures; hind margin edged with 

 black-bi'own crescents. Body and leg-tnfts reddish-drab ; 

 legs purplish-brown. Underside of the female much paler. 



Usually only slightly variable in the depth of colour of the 

 fore wings, but rarely, and more especially in fen districts, a 

 singular variation occurs in both sexes, having the thorax and 

 fore wings of a smooth uniform purple-brown or black-brown 5 

 this being known as var. fratcrna, Tr. 



On the wing in August and September. 



Larva very elongated ; skin highly polished, sides puckered ; 

 second and anal segments with horny plates ; head and plates 



