THE ENTOMOLOGIST. 



347 



and Covyna are included in the Spbegigasleiidae, and C. 

 clavata is supposed to be identical with the Chrysolarapus 

 suspensus of Nees, which that author states to live during its 

 metamorphose in the larva of Aphidius Rosarum, from which 

 he saw it in the act of emerging. But he does not mention 

 what progress the Aphidius had made in the consumption of 

 the Aphis before it was checked by the Coryna, and became 



COEYNA CLAVATA. 



subject to the like process. The history of the parasitism of 

 Chalcidiae must be unavoidably accumulated by fragments, 

 such as the above notice, and these in due time will be set 

 in order, and a Catalogue, preceded by comparative examina- 

 tion of every kind, will be a ground-work requisite for a 

 knowledge of the natural history of the tribe by means of 

 successive investigations. Much has been lately published 

 on the herbivorous habits of some species ; and the tribe, as 

 regards their food, may be divided into three classes, thus : — 

 controllers of vegetation, controllers of vegetarian insects, 

 controllers of insectivorous insects. 



Very numerous species of British Chalcidiae have not yet 

 appeared in print, and a revision is required of many which 

 have been published, and thereby the Catalogues of them are 

 unavoidably incomplete. These are three in number, and I 

 will mention them shortly in succession, as they will not be 

 noticed after the issue of a new Catalogue. The first is in 

 ' A Guide to an Arrangement of British Insects,' by John 



