370 JOURNAL OF ECONO]\IIC ENTOMOLOGY [Vol. 10 



rice harvest, and again in the spring before the fields are flooded. 

 Therefore it is recommended that mosquito control measures be put 

 forth with vigor both before and after the fields are flooded. 



While dragonflies breed in enormous numbers in the rice field they 

 appear too late in the larval form to reduce the mosquito larvae and 

 the consequent hordes of mosquitoes to any appreciable extent. If 

 dragonfly larvae could be produced in sufficiently large numbers very 

 early in spring and were transplanted to the rice fields at the begin- 

 ning of the season some appreciable effect might be secured. 



Bat roosts in the neighborhood of rice fields have been recommended 

 but our experience with bats does not lend a very hopeful aspect to 

 this means of control. 



That much quinine is consumed in the malarial regions of California 

 without apparent good results is quite evident. Self-treatment with 

 large quantities of quinine without regard to schedule is commonly 

 practiced. Enormous sums of money are expended for quinine and 

 sundry patent medicines, — much of it uselessly. 



The winter treatment of malaria carriers in all sections where the 

 disease occurs and proper quinine prophylaxis in districts difiicult to 

 control deserve much more attention than is at present accorded these 

 matters. 



As a direct result of the malaria-mosquito survey there will come 

 many new organized mosquito abatement districts under the act above 

 described, but no doubt the greatest good coming out of the work is 

 fundamentally educational in that literally thousands of persons, — 

 men, women and children, — were reached on their own ground and 

 were told what malaria is, how it is carried and how to control it. 

 In many instances the writer saw the remedy (mosquito control) ap- 

 plied before he left. 



It is planned to complete the survey of the state during the coming 

 summer, starting early in May at the southern border and working 

 northward. 



The two papers were generally discussed by R. W. Doane, A, W. 

 Morrill, Earl Morris, C. W. Woodworth, E. 0. Essig and others. 



Chairman A. W. Morrill: The next subject will be presented by 

 Mr. G. A. Coleman. 



