Hawkmoths of Brazil by Alan Martin
1. Aellopos with a white rump
A. tantalus tantalus: smaller than fadus and titan and with only three spots in a line and a fourth above the outer one. Diurnal.
A. clavipes clavipes: almost identical to tantalus and only the males can be separated by a microscopic examination of the legs.
A. fadus: two lines of white spots across the forewing but note the double spots in the centre of the outer row. Diurnal.
A. titan: similar to fadus but lacking the double white spots and with a black discal spot. Diurnal.
2. Aellopos without a white rump
A. ceculus: no white rump and bright yellow on hindwing. Diurnal.