106 OF SOCIABLE CATEBPILLAKS. 



" I now took up the leader, obviously less, though 

 more active and intelligent than the rest, when the 

 alarm instantly spread over the whole line. I ex- 

 pected the second to take the command, but he 

 seemed the most distressed of any, and eagerly 

 sought about from side to side ; and, in his per- 

 plexity, he turned quite around, as if consulting with 

 his follower. The hesitation and confusion was now 

 universal. Various parties broke oft' as the impres- 

 sion reached the rear, and sought anxiously about, 

 returning again to the line. Having replaced the 

 leader at the head, he instantly took the command, 

 and advancing with confidence, and conducting the 

 whole line in perfect order. When I now inter- 

 rupted their march, the main body no longer ex- 

 hibited their former anxiety and impatience when 

 the leader was removed, but seemed to wait with 

 perfect composure and confidence until the obstruc- 

 tion was overcome, which the leader used every 

 means and ingenuity to accomplish. It did not 

 occur to me till I had left these amusing travellers, 

 to try the experiment of placing the leader at the 

 rear, in order to observe how he would bear the 

 degi-adation, and to ascertain if the head of the 

 column would have been thereby changed."* 



Besides those larvae which conceal themselves, and 

 transform in their cocoons, there is a tribe which 

 buiTow under ground ; these have been called Earth 

 • BftKwsT Ell's Journal of Science, ii. 94. 



