I04 LEPIDOPTERA. 



slenderly margined with pale brown j thorax black; collar 

 yellow ; abdomen yellow, belted with purple and black. 



Antennas rather short and stout, pectinated (or rather 

 laminated), in the male, black. Head dark brown with a bar of 

 paler brown across the forehead ; collar bright yellow ; thorax 

 blackish brown, with some long yellow scales at the back ; 

 first two segments of the abdomen black-brown, the third 

 bright yellow edged with black, the fourth dark purple, or 

 else yellow edged with purple-black, or even partially shaded 

 with purplish ; the remaining segments bright yellow 

 edged with black, except the last, which is tipped with 

 orange and purplish, and ends in a blunt point. Legs 

 brilliant orange-red shaded with yellow. Wings transparent, 

 with the nervures orange-brown, but when freshly emerged 

 covered with loose, yellowish-brown, scattered scales ; costal 

 margin of the fore wings narrowly orange-brown, slightly 

 broadened towards the apex ; dorsal and hind margins also 

 narrowly orange-brown; discal streak sinuous, reddish orange ; 

 margins of hind wings, and all the cilia, orange-brown. 

 Sexes similar except that the female is larger and con- 

 siderably stouter than the male. Underside of the wings 

 similar to the upper, but yellower ; palpi bright yellow ; 

 face and under part of thorax purplish-brown; abdomen 

 purplish-brown banded with yellow, especially towards the 

 anal segment. 



End of June to August. 



Larva one inch in length. Head rounded, dark-brown ; 

 body tapering considerably behind, yellowish- white ; dorsal 

 plate pale yellowish, edged with blackish behind ; legs 

 brown, prolegs extremely small and inconspicuous. In the 

 bark and solid wood of sallows {Salvx, caprca), osiers 

 (;S'. viminalis), weeping willow {S. Bahylonica), and black 

 poplar (Popuhis nigra) ; feeding about two years. Full fed 

 in I\fay or June. Li the woods of the southern portions of 

 England the sallows only are commonly attacked, a large 



