308 THE BOMBYCINA. 



to shift its quarters in consequence of the exhaustion 

 of the tree in which it is living. It diffuses an ex- 

 ceedingly disagreeable odour^ in allusion to which the 

 name of the Goat has been given to it. It will always 

 be an object of interest with the Entomologist^ from 

 its having furnished Lyonnet with the subject for his 

 wonderful anatomical work_, which first showed the 

 astonishing complexity of the internal anatomy of an 

 insect. Some idea of this may be obtained from the 

 circumstance that Lyonnet found no less than 4061 

 muscles in the body of this caterpillar, and of these 

 228 are contained in the head. A time comes, how- 

 ever, when all this wonderfully complex mechanism 

 of motion is no longer required, and the Goat Moth 

 caterpillar passes into a state of death-like repose; 

 the caterpillar first spinning a cocoon, to which it at- 

 taches small fragments of wood, in the interior of one 

 of its burrows. The pupa has some transverse rows 

 of short spines directed backwards upon the segments 

 of its abdomen, and these come into use when the 

 perfect insect is about to emerge; the pupa then 

 pushes itself forward in its burrow until about half of 

 it projects beyond the surface of the tree, by which 

 means it is enabled to quit its retreat without the 

 least risk of damage to the delicate coating of scales 

 with which its wings are covered. The perfect insect 

 is of a cloudy grey colom*, with waved streaks of black 

 upon the wings ; it may be found in the daytime, al- 

 though not very abundantly, upon the trunks of the 

 trees which have served it for its nourishment in the 

 larva state. It appears in June and July. 



On examining these Moths, we find that, besides 

 the thick bodies and long powerful wings, which give 

 them a sort of general external resemblance, they 



