314 LEPIDOPTERA. 



tliis form I have seeu iu several collections. One in Mr. Sydney 

 Webb's cabinet is further shaded off from this stripe inwardly 

 so as to present a l)road cloudy band ; another has this stripe 

 placed almost close to the first line, and not very black, the- 

 rest of the wings being- without markings ; and a third, very 

 different, specimen is of a most extraordinary purple or liver 

 colour, the markings obscured, but the costal margins and 

 apex of fore wings blackened. Mr. W. H. B. Fletcher has a 

 variety curiously following in the manner of one in the- 

 previous species — having the second line driven out of its 

 pro])er course to make room for an adventitious brown ring 

 above the anal angle. 



On the wing in May and June, and as a partial, but fre- 

 quent, second generation in August and September. 



Larva. Head broad, light brown, faintly reticulated at 

 the sides with darker brown ; mouth white ; body a little- 

 flattened, much wrinkled, ridged down the sides, light brown; 

 dorsal line pale yellow edged on each side by a slender dark 

 brown line , on either side of segments five to nine is a 

 rather oblique black-brown streak edging a long yellow 

 blotch in the region of the spiracular line, this yellow colour 

 being iu some degree difi^^used over the rest of the spiracular 

 region ; undersurface, with the legs and prolegs, pinkish- 

 brown. 



Or— Head and prolegs bright red-brown ; body bright light 

 green, dorsal line indicated by the two slender bordering 

 blackish lines ; the yellow blotches as before, but without the 

 brown streaks ; remainder of the spiracular region more 

 striped with yellow or white; and the subdorsal region 

 delicately and irregularly streaked with the same. 



June, July, and the beginning of August, and as a 

 (partial) second generation, in Septenil)er ; on beech {Fatju^ 

 sylvatiro). 



Pupa extremely truncate or squared in front, with minut&, 

 projeeting points at the shoulders : the limb and antenna- 



