304 LEPID OP TERA . 



kuown as A.'radiola — also pointed out that the variation in 

 colour of the hind wings is very remarkable, and described a 

 form of the female in which they are silvery-white. A very 

 fine male of this variety radia is in the collection of 

 Major J. N. Still, and was taken in Devonshire. Colonel 

 Partridge has a female of which the fore wings are of the 

 colour of the male, but set off by two conspicuous straight 

 perpendicular, blackish, transverse bars ; this was taken at 

 Portland. 



On the wing in July and August ; but occasionally, though 

 rarely, in May and June. On the Continent it is said to fly 

 in June. 



Larva plump, cylindrical, but with the head and anal 

 segment small ; in the region of each spiracle is a rather 

 semicircular inflation ; segmental divisions deeply cut ; legs 

 and prolegs small. Colour brownish-ochreous or dull 

 ochreous on the back, bounded on each side by the dark 

 brown edge of the subdorsal line; there is a delicate 

 mottling of rather darker brown, of a pear shape, on the 

 back of each segment, its broad end in front, through which 

 runs the dorsal line, brown or pale brown, thin at the 

 beginning, but expanding almost into an elongated diamond 

 form at the end of each segment, and distinctly edged with 

 darker brown, particularly at its widest part. The subdorsal 

 line is dark brown, having close beneath it a mere thread of 

 very pale greenish-grey, and from this to the spiracles the 

 sides are greyish-brown ; another pale thread, much inter- 

 rupted, running a little above the spii'acles ; below them is a 

 very faint trace of a double dirty-whitish line ; all the rest of 

 the lower and under surface being of a pale greenish-grey 

 tint, and semitranslucent. 



The head brown, the lobes and mouth marked with darker 

 brown and very shining; on the second segment is a dark 

 brown plate having three pale longitudinal lines. Spiracles 

 black ; usual raised dots very dark brown, each furnished 



