Proceedings of Eighth Annual Meeting 79 

 TABLE I 



Averages of Total Anopheles Collections at Negro Tenant Homes, 

 Mound, Louisiana, for 1914-1920 



average per building 

 Inside 



No. of house Under Misc'l 



Month yrs. * (Incl. porch) house Barns out-bldg. Total 



Jan. and Feb... 4 .5 .8 5.8 .1 7.2 



March 2 5.3 3.3 7.6 i.i 17.3 



April 4 5.5 10.6 10.7 i.o 27.8 



May 4 23.1 151.0 57.0 4.6 235.7 



June 4 19-8 336.9 101.4 8.4 466.5 



July 5 60.7 314.2 101.3 6.2 482.4 



August 5 34-7 211.4 50.2 3.5 299.8 



September .... 5 23.9 150.3 57.4 4.1 235.7 



October 3 6.3 17.4 13.4 i.i 38.2 



Nov. and Dec. 3 .3 2.5 1.5 .3 4.6 



MAY TO SEPTEMBER 



Average 32.5 232.8 73.4 5.3 344.0 



Per cent of total 9.4 67.7 21.3 1.6 100.% 



OCTOBER TO APRIL 



Average 3.6 6.9 7.8 .7 19.0 



Per cent of total 18.7 36.5 41. i 3.8 100.% 



*The number of years in which a monthly average for the corresponding 

 month is included in the summary. 



The above table, Table I, gives the final averages by months 

 and by types of resting places for the negro tenant buildings for 

 all locations which could be included in the summary. (Months in 

 any one year in w^hich only a fev^ collections v^ere made are not ^ 

 included). 



The principal months of Anopheles abundance v^ere the five sum- 

 mer months from May to September, and the Anopheles collected 

 during this period constituted 94.8% of the total catch. During the 

 wRrm summer months two-thirds (67.7%) of the Anopheles were 

 found underneath the houses. About one-fifth (21.3%) were taken 

 from stables, 9.4% from inside the houses and 1.6% from the miscel- 

 laneous outbuildings. 



During the cooler months, October to April, the resting places 

 for the relatively few mosquitoes found (5.2%) changed consider- 



