198 LEPIDOPTERA. 



fore wings triangular, pale greyish-drab with both lines 

 white, edged with pale reddish-brown, oblique and rather 

 direct. Hind wings pale smoky-brown, paler at the base. 



Antennas of the male small, simple, light brown ; palpi 

 small, upraised, white ; head and thorax smooth, white ; the 

 tuft at the back of the latter extremely minute ; abdomen 

 dusk} T -white ; anal tuft tinged behind with brown. Fore 

 wings triangular ; costa nearly straight ; apex and hind 

 margin rounded, the latter full above the anal angle ; dorsal 

 margin straight ; colour pale greyish-drab, base white 

 clouded with pale brown ; first line represented by an 

 oblique white line edging a broad equally oblique reddish- 

 brown stripe ; second line similarly oblique and direct, white, 

 forming the inner boundary of an obscure reddish-brown 

 cloud, which in its dorsal portion seems to form a partial 

 stripe and thence fades off; on the costa are three cloudy 

 white spots ; subterminal line perceptible as the outer 

 whitish edge of the cloudy band which borders the second 

 line ; along the hind margin is a more distinct whitish line ; 

 cilia dusky white clouded with pale brown. Hind wings 

 smoky-white shading off to pale smoky-brown near the hind 

 margin and still darker before the cilia, which are white. 

 Female similar. 



Underside of the fore wings grey-drab, shading off to 

 dusky white at the base and dorsal margin ; costa narrowly 

 paler ; cilia dappled with paler dashes ; hind wings white ; 

 body and legs brownish-white. 



Apparently not variable. 



On the wing in July and August. 



Larva. Head dark green ; body whitish-green with a 

 slender double darker dorsal line ; hairs minute, white, 

 arising from black raised dots ; spiracles white, ringed with 

 black ; dorsal plate brownish-yellow. June, in the stems of 

 Chnwphalium arenarium. (Hofmann.) It also feeds on other 

 species of Chia-phalium (Cudweed). 



