22 BULLETIN NO. 2, DIVISION OF ENTOMOLOGY. 
The question now arises, Has there been any plausible and practical 
means discovered during any of these extended tours by which the 
locusts can be exterminated? My answer to this, if direct, is no ; if in- 
direct, yes. In the first place we are to make an answer in accordance 
with the definition of the word exterminated. As I understand it, it 
signifies blot out, and that would require every individual insect of 
this species to be killed, which would be an utter impossibility. But, 
by various methods already described in the annual reports of this Com- 
mission created by Congress, their numbers could be and will be so 
killed off from time to time as to bring them under the control of their 
natural enemies. 
During our trip this summer we saw a few locusts of the migratory 
species at Bismarck, Dak., at Fort Buford, and two or three specimens 
at intervals afterwards, but nowhere were they as numerous as most 
species of the "natives." Locusts were also seen in small numbers by 
Prof. C. A. White while in the vicinity of Glendive, Mont. Professor 
Aughey also saw a few at several points, and Mr. E. R. Dodge reports a 
few as having been seen in Colorado. Others were reported as having 
hatched this spring among the sand hills between the Niobrara and 
Loup Rivers. In none of these cases, however, were they sufficiently 
numerous to cause fear of an invasion for the following summer. 
