SUSPENSION OF VVTM. 



281 



the manner of the leaf-rollers, another most unusual 

 and remarkable circumstance.* 



Another caterjjillar of the same family, that of 

 the swallow-tailed butterfly {PopUio Macliaon, 

 Linn.), one of our lincst but local native insects, 

 rhaving a body less pliable than the preceding, has 

 cecourse to a still ditlbrent metiiod of forming a 

 pincture. The proceedings of this beautiful cater- 

 tillar, distinguished by two retractile horns, like 

 hose of a snail, may be illustrated by the mode in 

 which a skein of silk is wound from the hand. The 

 insect first attaches the end of his thread to the spot 

 selected for hanging up the chrysalis, such as the 

 bend of a branch of fennel or wild carrot, on which he 

 has been feeding; and extends it outwards by the 

 hooks on his claws, by wiiich means he keeps it 

 stretched till he fixes it on the other side, formuig a 



a. Caterpillar of the swnllow-tailed butterfly, veaving its sus- 

 pensory cincture, b, the caterpillar suspended for its change, 

 c, the chrysalis suspended in a sijndar nmuucr. 



J. R. 



24* 



