8o LEPIDOPTERA. 



brown, darker ou the uervures and bind inarj^in ; cilia 

 whitish brown. In the female the head, thorax, and 

 abdomen are white or dusky-white, fore wings white or very 

 pale yellow-brown, but the white stripe and other white 

 markings so extended that the darker portions become mere 

 brown lines ; and the cilia of all the wings white, though 

 the hind wings have still a smoky tint. 



Underside of the fore wings of the ground colour of the 

 upper, but without markings; the hind margin j)aler — in the 

 female white — hind wings of both smoky white. Body and 

 legs of the colour of the fore wings. 



Usually constant in colour in the male, but on the Scot- 

 tish hills the fore wings become darker brown, and the 

 markings, except the central stripe, very faint or absent; the 

 female is more variable in colour generally, and in Ireland 

 sometimes is found pure white except for a faint gloss of 

 markings. 



On the wing in May and June, but in northern districts in 

 July. 



Larva five-eighths of an inch long; head slightly narrower 

 than the second segment, its lobes rounded, bright brown, 

 highly polished, marbled with sienna-brown. and the mandibles 

 of the same colour ; dorsal plate shining light brown ; body 

 cylindrical, but slightly iiattened beneath ; dingy greyish- 

 olive ; raised dots all polished, large and prominent, dark 

 smoky-olive ; ventral surface and prolegs uniformlv of the 

 ground colour of the dorsal surface ; legs polished black. 

 (G. T. Porritt.) 



August till April ou grasses, living in silken galleries 

 among the grass-stems on the ground ; eating the grass- 

 stems close to the roots, especially beneath the surface of 

 the earth. Apparently on all the common grasses — 

 Hofmann specifies Aii-a jicxaosa, and says that the long 

 silken tubes of the larva are covered with e.xcrement and 



