The names of two common nearctic species of Aedes barri Rueger and trichurus (Dyar) are shown to be junior synonyms of Ae. euedes Howard, Dyar and Knab, and Ae. provocans (Walker), respectively. Ae. beklemishevi Denisova and Ae. grandilarva Sazonova, as senior synonyms of barri, are automatically included as synonyms of Euedes. Ae. mediolineatus (Ludlow) is transferred from the synonymy of Ae. dorsalis (Meigen) to that of Ae. melanimon Dyar; through the older name, mediolineatus is fortunately not available because it is preoccupied in the genus Aedes. Two other names of Aedes also in synonymy, albertae Dyar, and masamae Dyar, are transferred to the synonymy of mercurator Dyar, and hexodontus Dyar, respectively, and some of the variation in hexodontus is discussed. Evidence is presented in support of Danilov's (1974) recognition of Ae. mercurator as a species distinct from A. stimulans (Walker). Finally Ae. aloponotum Dyar, used by various authors alternately as a synonym of excrucians (Walker) or as a distance species, is briefly redescribed and compared to excrucians, euedes, fitchii (Felt and Young) and riparius Dyar and Knab.