Proceedings of Eighth Annual Meeting 83 



daily rate for fed females was 40.1 per host in 1920 and for the 

 same months in 1919 it was 6.4 per host. 



4. The types of resting places in which Anopheles were found, 

 with the relative abundance for the summer months, were as follows : 

 Under houses, 67.7%; stables, 21.3%; inside houses, 9.4%; and 

 miscellaneous out-buildings, 1.6%. In the colder months, October 

 to April, with an average of 19.0 adults for each tenant house and 

 its outbuildings (including stable), the relative abundance was: 

 stables, 41.1%; under houses, 36.5%; inside houses, 18.7%; and 

 miscellaneous outbuildings, 3.8%. 



5. Four species of Anopheles have been encountered, of which 

 Anopheles quadrimaculatus is by far the most abundant, constituting 

 98.53% of the total number of Anopheles collected. 0.84% were 

 Anopheles punctipennis and 0.63% were Anopheles crucians, while 

 only three specimens of Anopheles pseudopunctipennis have been 

 determined. 



6. Blood examinations of the tenants on this plantation in August, 

 191 5, 1916, and 191 7, gave an average malaria parasite rate for the 

 three years of 16.5%. 



The authors wish to acknowledge the assistance received in the 

 collections from the following : Messrs. H. H. Kimball, R. Cox, T. 

 H. O'Neill, W. H. Dumont, U. C. Loftin, A. H. Greer and L. Z. 

 Naylor. 



As I say, this is only one aspect of the investigation and is given 

 to you to show how extensively they have been going into the inves- 

 tigation. I will leave the paper with the Secretary for future pub- 

 lication. ( Applause ) . 



President Rider: Next on the program is a discussion "The 

 Mound Louisiana Work" by Dr. Frederick L. Hoffman, Statistician 

 of the Prudential Life Insurance Company. Now the Prudential 

 Insurance Company has as much interest in prolonging life as any 

 of the rest of us. 



