242 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
turn them over to the township trustees, who have previously estimated 
the amount they will need in their townships and who are held responsi¬ 
ble for the work. The farmers come to their township trustees for 
their materials. In other cases, the farmers all come to the county 
seat where the materials are checked out by the commissioners, or 
the county farm agent. If the township trustee is not familiar with 
the proper method of preparing the poison bait and distributing it, 
either the county agent, or a person from the college will spend a day 
with him in order to demonstrate the proper method of mixing and 
distributing. As a matter of fact, since the bran mash has been used 
very extensively for several years, nearly all of the farmers are thor¬ 
oughly acquainted with the work, and need no assistance except in 
organizing for concerted action. 
Mr. Stewart Lockwood: It might be of some interest to know 
that in North Dakota we have put on a campaign along similar lines. 
We have been forced to use 6,600 tons of bran and about 540,000 
pounds of arsenate with the ingredients to go with it. We haven’t 
had time to experiment with different formulas, but we have taken the 
Kansas formula with the exception of adding four pounds of salt to 
the arsenic, and we have advised the farmers in every case to ferment 
their mixture, that is, to keep it in a barrel or sack that is damp twenty- 
four or forty-eight hours before it was spread. We will say that up 
there in North Dakota the poison bran mash that had been fermented 
gave much more satisfactory results than the other. 
President W. C. O’Kane: Mr. J. W. McColloch will present the 
next paper, “A Study of the Oviposition of the Corn Earworm with 
Relation to Certain Phases of the Life Economy and Measures of 
Control.” 
A STUDY OF THE OVIPOSITION OF THE CORN EARWORM 
WITH RELATION TO CERTAIN PHASES OF THE LIFE 
ECONOMY AND MEASURES OF CONTROL 1 
By James W. McColloch, Associate Entomologist , Agricultural Experiment Station, 
Kansas State Agricultural College 
In 1908 the Department of Entomology of the Kansas Agricultural 
Experiment Station undertook a complete study of the corn earworm 
(Chloridea obsoleta Fabr.) with relation to its injury to corn in Kansas. 
These studies had been in progress but a short time when it became 
apparent that a thorough investigation of oviposition in the field would 
furnish much valuable information relative to many points in the life 
1 Contribution No. 43 from the Entomological Laboratory, Kansas State Agri¬ 
cultural College. This paper embodies some of the results obtained in the prosecu¬ 
tion of project No. 9 of the Agricultural Experiment Station. 
