An Olfactometer for Measuring Host-Seeking Behavior of Female Aedes Aegypti (Diptera: Culicidae)1

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Abstract
A novel olfactometer, suitable for recording hostseeking behavior of mosquitoes, is described. This vertically oriented olfactometer operates by passive diffusion of attractant vapors and contains funnels and baffles which direct both attractant and mosquitoes. The olfactometer discriminates between questing and nonquesting mosquitoes within a few minutes. The results are unaffected by crowding (within certain limits) and time of day. Insemination does not affect questing behavior in this device, but sucrose ingestion inhibits host-seeking. The features of this device are compared to those of previously described olfactometers.

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