THE ENEMIES OF WILD LIFE 207 
at not less than $5,000. In July, 1917, 2 male wolves were 
killed in Wyoming which in May had destroyed 150 sheep 
and 7 colts. Another pair of wolves killed near Opal, Wyo., 
were reported to have killed about $4,000 worth of stock a 
year. Another Wyoming wolf, trapped in June, 1918, had 
killed 30 cattle during the spring. These figures indicate 
the destructive powers of predatory animals. 
During the year ending June 30, 1919, the following num- 
bers of predatory animals were taken by hunters under the 
direction of the United States Biological Survey: 
NCH Se raises arrotel sk ace A wid ars fo 584 BQ D-GATS Worle histecn iia shesicl& 4,123 
OW OER. es Ce os ae ned 27,100 Tigmedis aa Mess iat y wt eine 43 
MOURAIS Sa eh oaks sees 149 CHES SI o av hee iae enter sibel 81 
In the case of especially destructive animals, exceptionally 
skilled hunters and trappers are detailed to capture such 
animals as rapidly as they are reported, and it is stated that 
the success in capturing them has resulted in a great addi- 
tion to the meat output of the ranges. 
In response to my inquiries respecting the organization 
of the Biological Survey of the United States Department 
of Agriculture for the control of predatory animals, Dr. E. 
W. Nelson, chief of the Bureau, has very kindly furnished 
me with a memorandum giving full details of the manner in 
which this important work is carried on, from which state- 
~ment, which is dated March, 1917, the following account has 
been prepared: 
The infested area is divided into ten districts with an 
inspector in charge of the work in each district, and an in- 
spector at large is continually in the field co-ordinating and 
supervising the entire work. The districts are as follows: 
Oregon-Washington, Montana, 
California-Nevada, Wyoming, 
Idaho, Colorado, 
Utah, New Mexico, 
Arizona, Texas. 
