We found 4 species of mosquitoes bearing eggs of the human botfly, Dermatobia hominis, in the Reserva Municipal de Trabiju, Pindamonhangaba, São Paulo, Brazil. The mosquitoes were simultaneously collected in landing-biting catches by 2 collectors. From a total of 6,902 specimens collected from January through April 2010, the 15 females carrying D. hominis eggs belonged to Aedes scapularis, Limatus durhamii, Onirion personatum, and Wyeomyia confusa. The first 3 species are new reports of phoresy among mosquitoes and the human botfly.
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