The Olfactory Responses of Female Mosquitoes1

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Abstract
An insect olfactometer is described in which the simultaneous responses of groups of mosquitoes to an odor bearing air stream and an odorless air stream are recorded photographically. Data are presented which indicate that females of Aedes aegypti and Anopheles quadrimac -ulatus are attracted by the odor of the human arm when the odor is presented at 34[degree]C and in a rel. humidity range of 70-85%. Data are also presented which indicate that CO2 in concns. of 1, 10, or 50% in air is not an attractant for females of the above spp. of mosquito when tested in the olfactometer.