APPENDIX. 



The Early Stages of Ichneumon Parasites. Ganin has 

 shown that certain Proctotrypidoi {Platygastei\ Poli/neyna, 

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

 as well as the larva? 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. G52. 



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) 



