21 
ANOPHELES IN HOUSES. 
As always, it was found in these surveys that, having regard to the 
production and proximity to sources of production, A. quadrima¬ 
culatus were found in residences in much greater numbers than A. 
punctipennis , while the difference was far less for sheds, pigpens, 
unoccupied houses, under houses, etc. To give the averages of the 
species found would be futile unless the distances from the source of 
production of each species and the extent of production were given. 
In a section of one village, Talladega Springs, 10 houses appar¬ 
ently received their mosquitoes from (1) a small branch producing 
A. punctipennis profusely, but no A. quadrimaculatus , and (2) a con¬ 
crete tank yielding about 5 per cent A. quadrimaculatus , 95 per cent 
A. punctipennis , and breeding profusely. There were other sources 
of A. punctipennis within a reasonable distance, but none of A. quad- 
rimaxmlatus for four-fifths of a mile. Counting the production of the 
stream as equal to that of the tank—it was this, at least—the produc¬ 
tion of the two species close by should be 2J per cent A. quadrimasu- 
latus and 97^ per cent A. punctipennis , respectively. 
The 10 premises gave: 
Anopheles punctipennis: 
In residences_._____ 0 
Under residences_1__ 3 
Outbuildings_____ 30 
Anopheles quadrimaculatus: 
In residences_._ 24 
Under residences_ 21 
Outbuildings____ 24 
The residences then give, inside and under, a ratio of 1 to 15 (3 
to 45). That of the production is 40 to 1. In other words, we found 
about residences 600 times as many A. quadrimaculatus as A. puncti¬ 
pennis in proportion to production, at about the same distance from 
the source of production. 
The examination of 41 premises in the same village, including the 
above 10, having an occupied residence on each, gives: 
Anopheles punctipemiis: 
In residences_ 1 
On porches_ 1 
Under residences_:- 19 
Outbuildings_ 61 
In walled spring_|- 17 
Anopheles quadrimaculatus: 
In residences_ 43 
On porches_ 4 
Under residences_ 31 
Outbuildings- A ---- 91 
In walled spring- 1 
