igo LEPIDOPTERA. 



darker brown than the surrounding colour, edged by ex- 

 tremely thin and faint whitish marginal lines ; below the 

 latter is a very faint cloudy central shade ; cilia glossy brown. 

 Hind wings dull white or smoky-white with rather browner 

 nervures ; cilia concolorous. Female extremely similar, a 

 very little smaller, the body thicker, with a small anal 

 tuft. 



Underside of the fore wings pale smoky-brown along the 

 costa, apex, and hind margin, shading off to smoky white on 

 the dorsal margin ; reniform stigma very obscurely blacker. 

 Hind wings dusky white, broadly dusted with reddish-brown 

 along the costal region, and with dull brown along the 

 hind marginal ; central spot small, black. Body and legs 

 dull brown. 



Slightly variable in the depth of colour, from paler to 

 darker brown. In Ireland there is a tendency to greyer 

 colouring, but with the hind wings unusually white. A 

 specimen in the collection of Mr. S. Stevens is nearly black. 



As already remarked this species is best separated from 

 the previous — to which it is closely allied — by its slightly 

 narrower fore wings and their smooth silky texture, arising 

 from the small closely-appressed scales. The central shade 

 is also less definite and hardly curved. 



On the wing from the end of June to the beginning of 

 August. 



Larva thick, short, slightly tapering to each extremity, 

 excessively sluggish ; head rounded, yellowish-brown ; general 

 colour greyish-brown with an olive tinge ; dorsal line dark 

 brown at the incisions of the segments, spreading out into a 

 broad indistinct cloudy blotch on each segment ; subdorsal 

 lines white, edged with brown ; spiracular line light brown, 

 indistinct ; ventral surface very pale olive-brown. Thinly 

 covered with short curved hairs placed in rows, alternately, 

 one row pointing forward, the next backward, so that when 

 looked at sideways the hairs seem to form arches. 



