1915} Behavior of Anopheles 259 
About fifty per cent of the mosquitos in the nets having 
dogs or hens as bait, showed blood meals, but there is no way of 
telling whose blood it might be. In one net, a patient negro 
combatted no less than fifteen thousand sand-flies! Horseflies 
occasionally appeared in nets. 
II. Quimby’s Intercepting Planes: Mr. E. Frederic 
Quimby, a Division Sanitary Inspector, invented and had 
patented a contrivance by means of which he could detect 
the direction of flight of mosquitos. In principal his apparatus 
is much like that used in Massachusetts to trap young cater- 
pillars carried by the wind. Haskell (1913) described the appa- 
ratus and the claims given to it by the inventor. 
The scheme consists of a metal frame, holding four equal 
plates of glass, about a foot square each, at right angles to each 
other from a common vertical. The framework is mounted 
on a tripod which can be adjusted for height. The plates are 
smeared with a thin coating of transparent tanglefoot when 
in use. 
The data of his tests are abstracted from his reports to the 
Chief Sanitary Inspector, and are graphically represented in 
the following plate. In every instance the instrument was set 
up at places where flight of mosquitos was known to be occurring. 
Thus far there is very little data on hand to validate the far- 
reaching conclusions made by the inventor, however, in making 
this statement the writer does not wish to convey the idea that 
the apparatus is no good. The principal is right, and all it 
needs is sufficient experimentation to perfect it. If several 
instruments were set up and worked without man’s presence, 
the resulting catch would give valuable clues as to the direction 
of the breeding place from the town-site. Once the instrument 
is known to be fairly accurate, its use may become general in 
indicating those areas about a given town-site which require 
thorough sanitation, and the elimination from control of areas 
suspected as dangerous but which the experimental data shows 
relatively safe. 
Referring now to the diagrams, the dots represent mos- 
quitos actually caught on the sides nearest which these appear, 
and the arrows indicate the direction of the wind at the time. 
With a wind of 19 miles per hour at Mount Hope, “A,”’ one 
mosquito was found as indicated, and the conclusion was at 
