Scanning electron micrographs are used to illustrate descriptions of the eggs of Aedes (Ochlerotatus) caspius and Ae. (Stegomyia) africanus. The ventral surface of the egg in Ae. caspius is more curved than the dorsal and the outer chorionic cells are more elongate, smaller, and contain fewer tubercles than the larger, rounder, dorsal cells. The outer chorionic reticulum is unusually wide. In Ae. africanus, cells of the ventral surface contain a large, central tubercle, with many small peripheral tubercles almost invariably fused to the reticulum, which is narrow and elevated. Cell structure changes through a lateral transition zone to the completely different dorsal type, in which several small, low tubercles are scattered over the corrugated floor of each cell. The part of the micropylar disk surrounding the micropylar dome is vestigial or absent in Ae. africanus, exposing the dome to unusual prominence.