APPENDIX. 



THE EARLY STAGES OF ICHNEUMON PARASITES. Ganin has 

 shown that certain Proctotrypidce (Platygaster, Polynema, 

 Teleas and Opliioneurus) , the larvae of which live in the eggs 

 as well as the larvae of other insects, pass through a series of 

 remarkable changes, heretofore unsuspected, before assuming 

 the final and more normal larval state. He compares these 



Fig. 652. 



Development of Platygaster. 



changes to the hyper-metamorphosis of Meloe and Sitaris (see' 

 p. 478). The ovary of Platygaster differs from that of other 

 insects in that it is a closed tube or sac. Hence it follows 



(703) 



