1 76 LEPID OP TERA . 



of the CTenulations ; cilia pale brown tipped with white. 

 Female very much brighter in appearance, the dusting of 

 brown being almost absent, the ground colour of the wings 

 white, and the stripes and spots black-brown, with brown 

 clouds between black markings ; antenna) simple ; body a 

 very little thicker. The squared spot beyond the second 

 line is in this sex very conspicuous, and often the second 

 line itself thick and deep black. 



Underside of fore wings white, clouded with smoke-colour; 

 discal streak, and first and second lines, perceptible ; hind 

 wings whiter, faintly dusted with grey, central spot a small 

 black streak, followed by a slender transverse line, very faint. 

 Body and legs brownish white ; tarsi dark brown, barred 

 with white. 



Very little variable, the male hardly at all so. except in 

 the browner or more smoky tinge of the wings ; the female in 

 the sharpness and intensity of the markings, and in darken- 

 ing of the nervm-es of the fore wings. 



On the wing in May and June, but sometimes, in southern 

 localities and forAvard seasons, at the end of April. 



Larva elongate, transversely wrinkled ; sides puckered ; 

 two minute dorsal warts on the twelfth segment ; head large, 

 rather Infid. flattened in front, dark brown, face whitish- 

 ochreous, barred with dark brown ; body yellowish-brown, 

 slightly shaded with grey, especially at the incisions, and in 

 the vicinity of the usual dorsal raised spots ; the sides darker 

 and clouded with red; dorsal line broad, ochreous, but 

 lost in the ground colour after the first three or four 

 segments; dorsal raised spots black, those on the twelfth 

 segment elevated into two little tubercles ; undersurface very 

 pale yellowish-green. (C. Fenn). 



June and July on birch, beech, hornbeam, and oak ; feed- 

 ing at night ; remaining during the day upon the twigs of 

 its" food-plant, with which it stretches out parallel, holding 

 on with legs and pro^egs. 



