Host preferences of various strains of Aedes aegypti and A. simpsoni as determined by an olfactometer.

The author describes and illustrates a new type of olfactometer that can be used to determine the host preference of different strains of Stegomyia mosquitos. Experiments with human and animal hosts in Tanzania showed that dark strains of A. aegypti are much less anthropophilic than light strains.

L-Lactic acid: a mosquito attractant isolated from humans.

L-Lactic acid was the major component in material isolated from humans that was active as an attractant for female yellow fever mosquitoes, Aedes aegypti (L.). The L(+)-isomer was several times as attractive as the D-isomer.