1915] Behavior of Anopheles 208 
aiteq si Peeim., its maximum ab about 6:40 p.m:, and was 
completed by about 7:00 p. m. The morning flights began at 
about 5:55 a. m., the maximum return Anophelene flight at 
about 6:05 a. m., ending at 6:25 a.m. The Anophelene return 
flight ended sooner than did that of teniorhynchus. The 
morning flight is shorter in duration than the evening one, is 
marked with greater precision than the evening one and takes 
place higher above the ground than during the evening. 
MORNING OBSERVATIONS 
LePrince Exp. 
—— 
aaa bie 
amen 
Se 
gin at Getun CZ - Mar. 29 ‘19 
-o 
Distances not recorded: 
7 
2300° = xvi 3620 Ft- 
astern Field = 
4 
4460 ° 
3080 * 
The important facts obtained during this extensive experi- 
ment were: 1, the finding of blood in mosquitos of the return 
flight; 2, finding of males in the return flight; and 3, the definite 
mechanical adjustment to light intensity. More such experi- 
ments as these of Mr. Le Prince are needed; they yield more 
useful data than a lot of learned speculations over a few ideas. 
II. Observations from Boats: While mosquitos were being 
trapped at the swamp, two inspectors in a small row boat 
moved up and down the old French Canal, and by lying on 
the bottom so as to have the sky for a background, one of the 
men would observe the mosquitos as they flew past. This 
method was the first used to learn that a flight actually was 
taking place. 
