Aedes (Stegomyia) laffooni Knight and Rozeboom and Aedes (Stegomyia) pseudalbolineatus Brug are 2 distinct species. Characters for separating laffooni from pseudalbolineatus are given. Male terminalia, female terminalia, pupa and larva of laffooni and female terminalia of pseudalbolineatus are described and illustrated for the first time. The range of Aedes laffooni is extended to include the Celebes.