35 2 
PREFACE. 
Bulletin 94, entitled " Insects Injurious to Forests and Forest 
Products/' consists of two parts and an index. 
Part I, "Damage to Chestnut Telephone and Telegraph Poles by 
Wood-Boring Insects," by Thomas E. Snyder, comprises the results of 
a special study of a serious damage to the base of standing chestnut 
telephone and telegraph poles by the wood-boring larva of a beetle 
designated by the author as the chestnut telephone-pole borer 
(Parandra brunnea Fab.). 
Part II, " Biology of the Termites of the Eastern United States, 
with Preventive and Remedial Measures," by Thomas E. Snyder, 
is based mainly on investigations and experiments conducted during 
the past three years by Mr. Snyder in connection with his work in the 
Branch of Forest Insect Investigations. It also includes unpublished 
notes by Messrs. H. G. Hubbard and F. L. Odenbach. Termites are 
among the most destructive insects to both crude and finished forest 
products in North America, among which may be listed construction 
timbers in bridges and wharves, telephone and telegraph poles, hop 
poles, mine props, fence posts, lumber piled on the ground, railroad 
ties, and the woodwork of buildings. The sudden crumbling of 
bridges and wharves, the caving in of mines, and the settling of floors 
in buildings, are sometimes directly due to the concealed work of 
these insects. The use of untreated wood-pulp products, sucl^ as the 
various composition-board substitutes for lath, etc., is restricted in 
the Tropics and southern United States because of the ravages of 
termites. In the cities of Washington, Baltimore, St. Louis, Cleve- 
land, New York, and Boston, and throughout the eastern and south- 
ern United States, damage by termites to the woodwork of buildings 
is occasionally serious. 
Methods of prevention and control against injuries to finished and 
utilized forest products, etc., are based on the results of experiments 
conducted by this branch of the bureau. 
A. D. Hopkins, 
Forest Entomologist. 
