BOMBYCIA. 



2-2 b (1880) ; Buckler, Larvae of Brit. Lepid. iv. pi. 54, 

 figs. 6, 6 a (1891) ; Barrett, Lepid. Brit. Isl. p. 198, 



pi. Iiy, figS. 2-2 C (1896). 



Ceropacha or, Stephens, 111. Brit. Ent. Haust. iii. p. 53 (1829). 



The Poplar Lute-string. 



This species expands about an inch and a half. It is 

 common in most parts of Central and Northern Europe, and 

 in Northern Asia. 



The fore-wings are ashy-grey, sometimes slightly shot with a 

 peach-blossom tint. The base is very light-coloured, and is 

 bounded by a dark double stripe, beyond which is another 

 double dark zig-zag stripe. Beyond these stripes are two light 

 green spots on a pale ground, the inner of which is sometimes 

 entirely wanting. The outer is elongated, notched above and 

 with a small brown streak beneath. Beyond the central area is 

 another dark double zig-zag line, and then a pinkish gloss, 

 containing a whitish line, which commences at the apex in a 

 curved blackish streak, and is crossed by five blackish nervures. 

 The fringes are brown, streaked with black. The hind-wings 

 are yellowish-grey in both sexes, with darker hind margins, 

 and occasionally a lighter band in the middle. The fringes 

 are greyish-white. 



The larva feeds on various species of poplar. It is pale 

 green, or yellowish green, with a rusty-brown head, a dark dorsal 

 line, and a yellowish spiracular line, in which the spiracles stand 

 out white. 



