The ecology of the dry-season populations ofAedes Stegomyiamosquitoes was studied in Use, Uyo, Cross River State, Nigeria, between November 1977 and May 1978.The adult insects were sampled by two collection methods: (1) crepuscular human bait and (2) sweep-netting from forest and village (outdoor and indoor) locations. Oviposition and breeding habits of the insects were assessed from CDC ovitrap collections and from a survey of larval presence in domestic and peri-domestic containers. In each case, insects were sampled in the months of November, January, March, and May, corresponding with the early, mid, and late dry season, and the early rainy season, respectively.Fourteen species ofAedesmosquitoes, including fourAedes(Stegomyia) species, were found. Numbers and distribution of the species varied with the months and sampling methods. AdultAedes(Stegomyia) were most numerous in indoor and outdoor crepuscular human bait collections and least in forest sweep-net collections.Aedes aegyptiandA. africanuswere the most collected species. Unlike most otherAedesspp., they were consistently well represented in all the dry-season samples. Larval indices showed predominant breeding ofAedes(Stegomyia) species in peridomestic locations throughout the dry season, as well as the ecological adjustment to a container breeding habit by some otherwise well-known tree hole and pool breeding forms.Factors involved in the dry-season survival of the variousAedesspp. are discussed with reference to the possible implications of the insects' domesticity and year-round breeding activity.