Egg and First Instar of the Neotropical Geometrid Moth Pero obtusaria Prout (Geometridae: Ennominae: Azelinini)

The external morphology of the egg and first instar of the little-known Neotropical geometrid moth Pero obtusaria Prout, 1928 (Lepidoptera: Geometridae: Ennominae: Azelinini) is described and illustrated based on light and scanning electron microscopy. This is the first morphological study dealing with immature stages of a Neotropical species of the highly diverse New World moth genus Pero.