100 
THE BLACK LOCUST TREE AND ITS INSECT ENEMIES 
(WITH PLATE 212) 
The black locust (Robinia Pseudo-Acacia) is a native of North 
America and occurs naturally east of the Alleghany Mountains 
rom New York to Louisiana. It has spread, however, or r been 
valuable ornamental! were it not for the obstacles in the way of 
its cultivation. 
The planting of the black locust for ornamental purposes or 
economic uses has been attempted from time to time and 
the wood useless and so disfiguring the tree as to make it worth- 
less as an ornamental. 
The keeping qualities of the wood of this tree are so remarkable 
that it has been repeatedly suggested for such uses as railroad 
exception of a very thin outer layer, is sound and shows no 
signs of decay. It is this quality which has Cay ae the 
attempt to grow this tree on a large scale for railroa 
feel justified in quoting his introductory paragraph which reads 
as follows 
