PHEOSIA. 275 



or dark brown spot behind the head, and two slightly raised 

 truncated humps on each of the segments from the sixth to 

 the eleventh, between which passes a dark green, or in the 

 reddish varieties, a deep-red longitudinal line. The caudal 

 hump is tipped with red. 



It feeds on hornbeam, sycamore, service-tree, &c. 



GENUS PHEOSIA. 



Pheosia, Hiibner, Verz. bek. Schmett. p. 145 (1822 ?) ; Walker, 



List Lepid. Ins. Brit. Mus. v. p. 1001 (1855). 

 Leiocampa, Stephens, 111. Brit. Ent. Haust. ii. p. 24 (1828). 



This genus differs from Notodonta in having the antennae 

 slightly pectinated in the female as well as in the male ; the 

 abdomen is stout, and considerably longer than the hind-wings, 

 and the fore-wings are long and rather pointed, with the hind 

 margin denticulated. There is a slight projection on the inner 

 margin. The larvae are smooth, with sixteen legs, and the 

 cocoon is formed of bits of wood bound together with silk. 



There are two common European species, both of which are 

 found in England. 



I 



THE SWALLOW PROMINENT. PHEOSIA TREMULA. 



Bomlyx tremula, Clerck, Icones, pi. 9, fig. 13 (1759); Lin- 



naeus, Faun. Suec. p. 298 (1761). 



Bombyx porcellana^ Hufnagel, Berl. Mag. ii. (3) p. 420, no. 38 

 i (1766). 

 Bombyx dictcea, Esper (nee Linn.), Schmett. iii. p. 290, Taf. 58, 



fig. 5 (1786); id. Forts, p. 27, Taf. 84, fig. 2 (1789); 



Hiibner, Eur. Schmefet. iii. fig. 22 (1800); Godart, Lepid. 



France, iv. p. 196, pi. 19, fig. i (18^2). 

 Bombyx trepida^ Donovan, Brit. Ins. vii. p. 63, pi. 239, fig. i 



T 2 



