1 ] STUDY OF 



the following as subdivisions of water-bred in- 

 sects. 



1 St.— Such as undergo the whole of their 

 changes in water, and are enabled to seek their 

 food in it, or upon it, throughout their lives. 



This subdivision would comprise, of cole- 

 opterous insects, the carnivora aquatica (the 

 hydrocanthari of Latreille, and Dyticidae and 

 Gyrinidae of Leach) and also the families Par- 

 nidae, Helophoridae, and Hydrophilidas of Leach. 

 It would likewise embrace the Hemipterous fa- 

 milies Nepadae and Notonectidae. 



2nd. — Such as undergo all their changes in 

 water, but to which, as perfect insects, water is 

 destructive. 



I presume the whole of the modern order, 

 Trichoptera, (the Phryganea of Linnaeus;) and 

 most of the genera of the family Tipulidae 

 would fall under this sub-division. 



3rd. — Such as undergo all their changes, ex- 

 cepting the last, in water, but to which, as per- 

 fect insects, water is destructive. 



The beautiful famihes of neuropterous insects, 



