INSECTS INJURIOUS TO FOREST TREES. 181 



thrush, and wren, which devour multitudes of insects as their daily 

 food, and are harmless to the trees ; although some of them are, 

 it must be allowed, too fond of seeds and fruit, when these are an 

 object of cultivation. 



Living, as foresters generally do, in sequestered parts of the 

 country, far away from the busy haunts of men, they have excel- 

 lent opportunities for studying some of the most interesting 

 sections of natural history, and their spare hours could hardly be 

 better employed than in gaining a knowledge of those branches 

 which affect the welfare of the plants under their care. A few 

 shillings judiciously expended in procuring a good rudimentary 

 treatise on entomology,* a small pocket microscope,' a sharp pen- 

 knife, and a few small spill or tin boxes in which to carry home 

 the insects for investigation, will enable any one to acquire suffi- 

 cient knowledge of the nature and habits of forest insects, to be 

 able to readily distinguish those that are injurious, and to quickly 

 discover their presence and apply a remedy if possible, before 

 they can multiply and do serious injury to the trees. 



* Such as Duncan's "Entomology," Hardwicke & Co., London; or 

 Stainton's "British Butterflies and Moths," Van Voorst, London; or Kollar's 

 "Treatise on Insects Injurious to Gardeners, Foresters, and Farmers," trans- 

 lated by Loudon. 



