JOURNAL OF ECONOMIC ENTOMOLOGY 
194 
[Vol. 11 
yield the most ticks when taken in the rocky situations. These facts 
are interesting and important. 
The writer wishes to acknowledge the valuable aid of his assistant, 
Mr. R. W. Wells, in conducting the studies upon which this paper 
is based. 
President R. A. Cooley: This paper is before you. Do you 
wish to ask questions or make contributions on the same subject? 
Mr. F. C. Bishopp: Dr. Parker’s discoveries in eastern Montana 
are exceedingly interesting to me. I believe probably the most im¬ 
portant bearing is that the facts he has found out there will be more or 
less applicable to the large area of the country infested by the spotted 
fever tick and where the disease occurs, notably: Idaho, Nevada, parts 
of California and I might say parts of Montana and Colorado. 
The work that has been done heretofore, as you probably know, has 
been confined largely to eastern Montana, where we have a special 
set of conditions and control matters worked out there are very clearly, 
as shown by Dr. Parker, not entirely applicable to conditions elsewhere 
in the West. . 
We have examined a good many jack-rabbits in different parts of 
the country and our experience has been that we seldom, if ever, find 
the female tick and it is our opinion that most of the ticks are dislodged 
on the jack-rabbits before they become full grown. 
Mr. R. R. Parker: We found them more or less on horses. 
President R. A. Cooley: Is there any further discussion? If 
not, we will call upon Mr. Wood for his paper on “Sodium Fluoride— 
A Specific for Biting Lice.” 
SODIUM FLUORIDE—A SPECIFIC FOR BITING LICE 
By F. C. Bishopp and H. P. Wood, Dallas, Tex. 
(Withdrawn for publication elsewhere) 
President R. A. Cooley: Is there any discussion? If not, we 
will pass on to the next paper, “Mosquito Flight as a Factor in the 
Problem of Control,” by Mr. Headlee, of New Brunswick, New Jersey. 
MOSQUITO FLIGHT AS A FACTOR IN THE PROBLEM OF 
CONTROL 
By T. J. Headlee, New Brunswick, N. J. 
(Withdrawn for publication elsewhere) 
