94 T1IE BUTTERFLY VIVARIUM. 



larvee of Butterflies and Moths, from that of the 

 Silk-worm down to the most minute grub of the 

 Tinece. Those of the wood-feeding class have, 

 however, more affinity in their habits, at this pe- 

 riod of their existence, to the larvae of Beetles. 

 The Cossus, being a long-lived larva, makes itself 

 each winter a sleeping-room, similar to that 

 which it eventually forms for its abode during its 

 change to the winged state, which it effects by 

 webbing together, with the silky secretion it is 

 furnished with for that purpose, the fragments of 

 wood produced by its own depredations. 



Some of the small Moths, among the Tortrices 

 and Tinece, also make themselves abodes for their 

 period of change from the debris which they have 

 created. Some of the same class of small Moths 

 unite several leaves to form a protection, and others 

 make one leaf serve their purpose, by skilfully 

 forming it into a hollow roll, in the interior of 

 which, within a slightly webbed cocoon, they pass 

 through the pupa state in tolerable security. These 

 are termed the Leaf-rollers. 



The process pursued by the Leaf-rollers is very 

 curious, and Avas first observed in all its compli- 

 cations by the indefatigable naturalist Bonnet. I 

 have not space for his interesting description, but 



