CHAP. r. THE TRANSFORMATIONS OF INSECTS. 



29 



substances in which they dwell (Fig. 84, 6). Some suspend 

 themselves by the hind feet alone (Fig. 79); others pass a 

 loop of silken threads around the fore part of the body (Fig. 

 87, b). A few of the former merely work the old skin back 

 upon the hind part of the body, where they allow it to remain; 



Fig. 82. 



Fig. 84. 



while in a very few the old skin is merely rent on the back, 

 and almost incloses the pupa. In the larvae of a great many 

 kinds of Two-winged Flies the larval skin merely contracts 

 and hardens (Fig. 76), completely inclosing the pupa. 



Fig. 85. 



Fig. 86. 



Those insects which pass through the various stages detailed 

 above are said to have a complete transformation (metamor- 

 phosis). 



But there are many insects (such as Grasshoppers, Plant- 

 bugs, etc.), which, when hatched from the egg, very closely 



