The external morphology of adult abdome of Almeidaia aidae Mielke & Casagrande, 1981 is described and illustrated for the first time. The results obtained were compared with others species of Saturniidae. This species is rare and endemic of the Cerrado region. Biological studies were published by the fourth author. This is the third of a series of papers about the species, the previous two were about head and thorax morphology.
Brazil; Cerrado region; moth; Neotropical
