QUADRIFIDAl. 245 



of the broad dark hind-marginal area, dark brown edged 

 inside with paler ; orbicular stigma only suggested by a 

 black-brown dot; reniforrn stigma conspicuous but rather 

 small, black-brown with a blacker margin ; before the 

 extreme hind margin is a faint row of black dots ; cilia 

 long and dense, dark brown. Hind wings large, rounded, 

 but crenulated behind ; light reddish-brown to the middle, 

 but with the costal edge pearly greenish-white ; beyond the 

 middle smoky-brown with a gloss of red-brown along the 

 hind margin ; cilia dull umbreous, paler at the tips. Female 

 a little smaller, with rather narrower fore wings, sometimes 

 more suffused with reddish-umbreous. 



Underside of the fore wings silky pale purplish -brown, 

 with the dorsal margin lustrous white, reniforrn stigma 

 lunate, black ; hind wings of the same colour as the fore but 

 dusted with brown, and with a lunate black central spot placed 

 unusually near to the base. Body and legs dull pale brown. 



Apparently not variable in any important degree. 



On the wing in May and June. 



Larva much elongated, stout in the middle ; head broad, 

 brownish-red ; body yellow-brown, abundantly covered with 

 slender longitudinal lines of red-brown atoms and dots ; no 

 dorsal line ; subdorsal lines indistinct, interrupted at each 

 segment except from the seventh to the ninth ; but on the 

 fourth replaced by a somewhat squared yellowish-red spot, 

 and on the following segments dotted with white ; spiracular 

 stripe more conspicuous, undulating, orange-red; at the 

 back of the twelfth segment is a rather raised ridge on 

 which is a cross-bar of orauge-red ; spiracles yellow, ringed 

 with black ; between the pairs of prolegs are large brown 

 spots ; legs and prolegs yellow-brown. 



July and August on oak and poplar, feeding upon the 

 young shoots. 



Pupa black-brown ; cremaster armed with six points ; in 

 a slight cocoon among moss or dead leaves. (Hofmann.) 



