256 



THE INSECT WOBLD. 



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 chrysorrhcea, Fig. 236), a species by no means rare in 

 England. The caterpillars live in quantities, on apple, pear, and 

 elm trees, and destroy the plantations of the promenades of Paris. 

 The females of this genus tear off the fur from the extremity of 



their abdomens to make a soft bed for 

 their eggs, and to preserve them from 

 the cold. And yet they are never to 

 see their young, for they die after they 

 have laid their eggs. Another tribe 

 of Bombycina contains species of a 

 small size, which are remarkable 

 from the habits of caterpillars which make, with foreign bodies, 

 cases, in the interior of which they live and undergo their meta- 

 morphoses. 



The. caterpillars of the genus Psyche, live in a case composed of 



Fig. 236. Liparis cln-ysoirhcea. 



Fig. 237. Case of Psyche muscella. 



Fig. 238. Psyche imiscella. 



Fig. 239. Case of Psyche nibicolelhi. Fig. 240. Case of Psyche graminelln. 



-3WB^^^ 



Fig. 211. Larva of Psyche graminella. Fig. 242. Psyche gramindla. 



fragments of leaves, of bits of grass and straw, of small sticks, 



