LEPIDOPTERA. 



25. 



tember and October the male of the Orgyia afitiqiia, with his tawny 

 wings, may often be seen flying about the streets of London. The 

 female (Fig. 234) is remarkable, as she has only the rudiments of 

 wings, and only goes as far as the side of her cocoon. The cater- 

 pillar of the Orgyia pudibunda, called also the Hop Dog, attacks 

 almost every sort of tree. When the state of the atmosphere favours 

 their propagation, they appear in fearful quantities, and cause the 



Fi^^ 235. — Orgyia pudibunJa. 



greatest havoc. During the autumn of 1828, in the environs of 

 Phalsbourg, they were to be counted by millions. The extent of the 

 woods laid waste was calculated at about fifteen hundred hectares. 

 It is common in this country. 



Among the genus Liparis, the species of which are also very 

 destructive to trees, we must mention the Brown-tailed Moth {Liparis 

 chrysorr/icea, Fig. 236), a species by no means rare in England. The 



