The rôle of the mosquito in the evolution of the malarial parasite.

Ross provided the last link in the chain demonstrating the complete life-cycle of the parasite of bird malaria. He found that mosquitoes which had fed on malaria-infected birds, and which had allowed the parasites to develop and lodge in their salivary glands, could then infect healthy birds, which in turn became malarious. See also 5247.