Abstract
Gynandromorphs of Aedes cinereus and A. excrucians are described in detail. Intersexes of A. abserratus, A. excrucians, and A. communis are described and illustrated. The differences between gynandromorphs and intersexes in mosquitoes are shown and discussed. Theories concerning the origin of gynandromorphs are reviewed and phenomena giving rise to intersexes in various species of mosquitoes and other insects are also presented. Reports of mosquito gynandromorphs in the literature have been separated into those which describe gynandromorphs and those which describe intersexes.