360 LEPIDOPTERA. 



there elbowed, and thence rounded off; dorsal margin nearly 

 straight; colour white, much dusted with yellow-brown, and 

 on the costal and hind-marginal areas with darker brown ; 

 first, central, and second lines narrow, equidistant, curved 

 and a little indented, obscure brownish-yellow, cilia yellowish- 

 white. Hind wings broad, rounded, similar in colour and in 

 dusting, and having two similar, obscure, curved transverse 

 stripes ; cilia yellowish-white. Female rather stouter, with 

 simple antennae, and colour sometimes whiter, but very 

 similar. 



Underside of all the wings white, abundantly dusted with 

 dull brown, especially so on the costal half of the fore wings. 

 Body and legs dusky-white. 



Variation in respect of the number of the transverse lines 

 occurs in this species in much the same degree as in the last ; 

 in the collection of the late Mr. Frederick Bond is a specimen 

 devoid of lines, and Mr. G. B. Routledge has taken a similar 

 example in Cumberland. Dr. Mason possesses a specimen in 

 which two lines coalesce just as is the case in the var. 

 rotundaria of C. pusaria, and others in which they tend in 

 the same direction. An individual taken at Scarborough, 

 and in Mr. Webb's cabinet, has the central and second lines 

 much broadened and toothed ; another, obtained from Tilgate 

 Forest, has the portion of the fore wings outside the second 

 line blackened. Further than this melanism does not seem 

 to obtain in this species. 



On the wing from the end of May or June till the beginning 

 of August, but apparently in but a single generation. 



Larva elongated, slightly attenuated in front, face sloping 

 forwards, flattened ; a dark purple, reddish, or brownish dash 

 on the outside of each lobe of the green head, and a grey 

 shade down the face ; body yellowish-green, yellowish-brown, 

 or brownish-green ; dorsal line pale grey, containing a black 

 spot at each incision and edged laterally with whitish ; each 

 segment shaded transversely with purple ; spots and spiracles 



