352 LEPIDOPTERA. 



slender, undulating lines, the inner dull yellow, the outer 

 black ; these lie along the base of the cilia, which are dark 

 brown dusted with dull yellow. Hind wings not broad, 

 brownish-white, shading off to a dark smoky-brown cloud 

 which fills the hind marginal area ; central spot and nervures 

 obscurely dark brown ; cilia crenulated and having along the 

 base a distinct undulating yellow line, edged by a parallel 

 line of smoky-brown ; the tips white. Female rather stouter, 

 but accurately similar. 



Underside pale umbreous, shading off to greyish-white at 

 the hind margin, and to pearly-grey on the dorsal margin ; 

 reniform stigma dusky-white, closely followed by a dark 

 brown transverse stripe, and this after a pale interval by 

 another. Hind wings dusky-white, broadly dusted along the 

 costal margin with dark brown ; nervures and hind margin 

 similarly but more minutel}'' dusted; central spot dusky- 

 black ; beyond it is a curved, slender, wavy, dark brown 

 transv^se line fading out before it reaches the dorsal margin ; 

 hind margins of all the wings distinctly edged with black 

 lunules. Body pale brown, dusted with smoky-brown ; legs 

 dark umbreous, barred with dull yellow ; leg-tufts and anal 

 tuft dark smoky-brown ; from the base of the abdomen, in the 

 male, spring two long curved tufts of yellow hairs, which 

 meet beneath. 



Hardly variable, except that it becomes more richly 

 coloured and darker in the North of Scotland, and very black 

 in the West of Ireland. 



On the wing in July and August, even in September in the 

 North. 



Larva moderately stout, nearly uniform in thickness, 

 except that the first and last segments are a little smaller ; 

 head full and rounded, lobes well defined, jaws large ; seg- 

 ments of the body plump, distinct at the divisions ; general 

 colour of the body light and rather shining pale flesh colour, 

 almost light drab on the thoracic segments, melting gradually 



