tRlFlDJE, 53 



ever, being divided by a whitish shade ; cilia white. Female 

 quite similar, except that the grey clouding of the hind wings 

 is without the whitish interval. 



Underside of the fore wings smooth, shining grey-brown, 

 with a whitish transverse line before the hind margin ; costal 

 region tinged with reddish, which is crossed by a black streak 

 beyond the middle, and with a yellowish triangle toward the 

 apex ; hind wings shining white, with the costal margin 

 thickly dusted with dark grey ; body and legs grey-brown. 



Irregular in size and expanse of wings ; also variable in the 

 colour of the fore wings, from rich reddish-grey through pale 

 reddish-grey to purplish -grey and slate-grey — darker or paler 

 — and with the subcostal triangle varying from yellowish to 

 white, or almost to orange. 



On the wing principally in August, September, and October, 

 but in some seasons, and in smaller numbers, in May, June, 

 or July, and there is a record of the capture of a specimen at 

 the end of March. Whether two generations occur, partially 

 or occasionally, in the year in this country, is not clearly 

 established. This is stated to be the case on the Continent, 

 but here the earlier emergence is so seldom found in any 

 abundance that pupge have been supposed occasionally to lie 

 over from the previous year. 



Larva plump, nearly cylindrical, but tapering a little in 

 front, and also sloping off suddenly from the twelfth segment 

 behind ; head small, rounded, yellowish-brown or grey-brown, 

 with a darker streak down each lobe ; body down to the 

 spiracles pale olive-brown or pale brownish-grey ; dorsal line 

 indicated by its faintly darker margins ; the subdorsal line, from 

 the fourth segment, is a series of black streaks, one on each 

 segment, commencing just past the incision and thickening 

 to near the next incision, where it is abruptly terminated ; 

 anal segment without the subdorsal black streaks, but having 

 a pair of slender streaks terminating the dursal line ; spiracles 

 white, ringed with black ; spiracular line slender, undulating, 



