40 SOME INSECTS INJURIOUS TO FORESTS. 



the borer and are otherwise vigorous and healthy. From a well-estab- 

 lished principle in the heredity of plants and animals, this practice of 

 propagating from the best examples must certainly 3' ield better results 

 than would follow a disregard of the character of the trees from which 

 seed or root propagations are made. 



For reference to literature, and other infoi-mation not included in 

 this paper, the reader is referred to Part I of this bulletin, pages 

 1 to 16. 



