PHEOSIA. 277 



is only slightly marked when young. There is sometimes a 

 yellow line above the legs. 



It feeds on poplars, willow, and birch. 



The pupa is cylindrical, chestnut-brown, with two points at 

 the extremity. It rests in a large cocoon of grey silk covered 

 with loose earth. 



THE LESSER SWALLOW PROMINENT. PHEOSIA GNOMA. 



Bombyx gfwma, Fabricius, Spec. Ins. ii. p. 190, no. 89 (1781). 

 Bomhyx dictceoides, Esper, Schmett. iii. Forts, p. 27, Taf. 84, fig. 



3 (1789); Hiibner, Eur. Schmett. iii. figs. 23, 24 (i8oo); 



Godart, Lepid. France, iv. p. 190, pi. 19, fig. i (1822). 

 Notodoiita dict(Boides, Ochsenheimer, Schmett. Eur. iii. p. 66 



(1810) ; Barrett, Lepid. Brit Isl. iii. p. 108, pi. 104, figs. 



2, 2a-d (1895). 

 Leiocampa dicicBoides, Stephens, 111. Brit. Ent. Haust. ii. p. 25 



(1828); Kirby, Eur. Butterflies and Moths, p. 141 (1880); 



Buckler, Larvae Brit. Lepid. ii. p. 160, pi. 35, fig. 2 



(1887). 



This is a common species in most parts of Europe. The 

 male expands about 2 inches, and the female from 2 to 2^^ 

 inches. 



It is distinguished from P. tremida by the following points : 

 The fore-wings are more darkly suffused, which brings out 

 more prominently the whitish-grey colouring. The shade is 

 broader and extends at the hind margin into the apex. The 

 three apical stripes are dark blackish-brown, and form the pos- 

 terior boundary of a white costal spot. At the hinder angle is 

 an elongated white s^^gittate spot, the point of which is directed 

 inwards. The blackish-brown marginal line extends on to the 

 fringes, giving them a somewhat chequered appearance. The 

 hind-wings are dirty white in the male, sha^'ed with brown on 



