NOTODONTA. 265 



Bombyx serrata^ Thunberg, Diss. Ins. Succ. iii. p. 60 



(1792). 



Bombyx tremula, Hiibner, Eur. Schmett. iii. fig. 30 (1800); 



Godart, Ldpid. France, iv. p. 222, pi. 21, fig. 2 



Notodonta trepida y Ochsenheimer, Schmett. Eur. iii. p. 86 

 (1810); Barrett, Lepid. Brit. Isl. iii. p. 118, pi. 106, figs. 

 2, 20, b (1895). 



Perilled serrata, Stephens, III Brit. Ent. Haust. ii. p. 33 

 (1828). 



Noiodonta tremula, Treitschke, Schmett. Eur. x. (i) p. 156 



(1834). 



Peridea trepida^ Kirby, Eur. Butterflies and Moths, p. 142 

 (1880) ; Buckler, Larvae of Brit. Lepid. iii. p. 9, pi. 36, 

 fig. 4 (1889). 



This species is found in most parts of Europe. It expands 

 from 2 to 2^ inches. 



The fore-wings are yellowish, varied with grey, with three 

 rusty-brown zig-zag transverse stripes, the outer of which is 

 hardly perceptible in the middle. In front of the hind margin 

 is a curved series of rusty-brown elongated spots bordered with 

 yellow, and in front of the fringes a similarly coloured stripe. 

 In the middle of the wing is a rusty-brown lunule bordered 

 with yellow. The hind-wings are yellowish-white, margined 

 with dark brown, and suffused with ashy-grey on the costa. 



The full-grown larva is smooth, yellowish-green, with two 

 white dorsal lines and an oblique red lateral stripe on each 

 segment edged with yellow. It feeds on oak (Quercus robur 

 and Q. ilex). 



It forms a cocoon of earth bound together with silk, and 

 changes into a blackish pupa with lighter incisions. 



This is a widely-distributed species in the British Islands, 

 but is seldom common with us. 



