February, ’20] PARKER: DERMACENTOR VENUSTUS BANKS 
31 
Mr. Herbert Osborn: I move that the next meeting of the Associ¬ 
ation be held at the same time and place as that of the American 
Association for the Advancement of Science. 
The motion was seconded and carried. 
PART II. PAPERS AND DISCUSSIONS 
Afternoon session, Wednesday, December 81, 1919, 1.30 p. m. 
President W. C. O’Kane: The chair wishes to announce the 
matter of policy in regard to papers. 
The time limit requested by the author will be allowed in each case 
and the time will not be extended unless by vote of the Association. 
If the author of a paper is not present when the paper is called, it 
will be passed to the end of the session. The papers left over will 
then be called in order. In the case of a paper sent in by a member 
who is not present, it will be read by title unless the Association votes 
otherwise. The chair believes that all members who attend the meet¬ 
ings and bring their papers should have preference over those who send 
them to the meeting. 
I would like to announce an invitation to visit the Stark Bros., 
Nurseries and Orchards, at Louisiana, Mo. 
We will now listen to a paper entitled, “New Facts Concerning the 
Habits of the Rocky Mountain Spotted Fever Tick, Dermacentor 
venustus Banks,” by R. R. Parker. 
THE PRESENT STATUS OF THE CONTROL OF DERMACENTOR 
VENUSTUS BANKS IN THE BITTER ROOT VALLEY, 
MONT., AND NEW DATA CONCERNING THE 
HABITS OF THE TICK 1 
By R. R. Parker, Bozeman, Mont. 
/ 
During the past sixteen years much time and money have been spent 
by various agencies, both medical and entomological, in the study of 
Rocky Mountain spotted fever, its mode of transmission, and the 
habits and means of control of the wood-tick, Dermacentor venustus 
Banks, the transmitting agent. 
Medical science has been more interested in the etiology and pathol¬ 
ogy of the disease and the possibility of finding a cure, than in the actual 
control, though a few men have labored in this direction. Dr. S. B. 
Wolbach of Harvard Medical School, working since 1916, has suc- 
1 Contribution from the laboratory of the State Board of Entomology, Bozeman, 
Mont. 
