Species not listed from Argentina by Knight & Stone (1997).
Larva and pupa unknown.
Eggs usually adhere to aquatic plants and larvae get air from them. Coquillettidia albicosta have been collected with Coquillettidia juxtamansonia, Coquillettidia venezuelensis, Mansonia titillans and Mansonia pseudotitillans sharing the same breeding places. Adults are large, aggressive biters and mostly zoophilic, but opportunistic in their preferences. Females were registered throughout the year except in August and November in Chaco Province, Argentina.