3i8 LEPIDOPTERA. 



clouds toward the liind margin iudistinct; cilia white with 

 regular black spots. Hind wings white, with the cloudy 

 transverse band from the anal angle sometimes nearly com- 

 plete, and with an indistinct central lunule ; cilia white, 

 sometimes spotted with grey or black. Underside glossy 

 greyish white, tinged with grey towards the base of the fore 

 wings ; in the male all the wings have a distinct black central 

 lunate spot, that of the fore wings being large and elongated ; 

 beyond this is a dark grey, or blackish, stripe from the costa 

 half way across each wing ; in the female the lunate spots 

 and the cross stripe are greyer and less distinct, but the first 

 and second transverse lines are visible ; cilia white, spotted 

 toward the apex of the fore wings with black ; body whitish ; 

 the legs, especially the first pair, very densely clothed with 

 long scales ; grey above, whitish beneath. 



Variation in the male is mainly in the breadth and intensity 

 of colour of the clouded central grey band ; in the female in 

 the ground colour, from white to grey, and in the depth of 

 colour of the transverse lines. Some male specimens have the 

 markings exceedingly strong and dark, both transverse lines 

 blackish, double, with white interspace, and between these 

 lines a broad slate-coloured central band, the scalloped clouds 

 of grey towards the hind margin also very dark. In rare 

 instances the female is strongly but more evenly clouded with 

 brownish-grey. 



On the wing in May and June. Occasionally, in confine- 

 ment, a partial second generation is produced in August or 

 September, or even as late as November. 



Larva 1^ to 2 inches long. Head round, surrounded with 

 hairs ; body plump, rather thickest in the middle, covered 

 with moderately abundant hairs and having on the fifth to 

 eighth segments four large flat-topped bunches or tufts of 

 extremely dense hairs, and on the twelfth another tuft more 

 slender, of double the length and running to a point. Head 

 green ; body green clouded with whitish, or yellow clouded 



