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Observations on the Relative Attractiveness of Man and Horse for Anopheles Albimanus Weideman¹

The preferential blood supply of mosquitoes has been the subject of much speculation because of the direct relation it bears to the biological ability of a species to act as a vector of a disease. Observations on the blood feeding habits of mosquitoes have been recorded by a number of persons. Le Prince and Orenstein (1), (1916) observed that in Panama horses were more attractive to Anopheles albimanus than were men. Earle and Howard (2), (1936) found that this species in Puerto Rico exhibited a marked preference for horses and oxen over man, with pigs and goats about equalling man in attractiveness.

The determination of blood meal by the ring precipitin test as advanced by King and Bull (3), enables observers to determine with a high degree of accuracy the source of blood of engorged females, which reflects the preferential feeding habits of a species.

Received September 4, 1943.
¹ The expressions contained in this paper are the private ones of the author and are not intended to represent official views of the Navy Department.

² Lieutenant Commander, U.S.N.R.