Immature stages of Pseudregolis wedah (Kollar, 1844) (Lepidoptera, Nymphalidae)

Abstract

The external morphology of the immature stages of Pseudergolis wedah (Kollar, 1844) are described and llustrated in detail together with some notes on larval behavior. The most conspicuous feature of the immature stages of this species appears in the pupal morphology. That is, the 8th and the subsequent abdominal segments are located along the posterior margin of the 7th segment, and arranged dorso-ventrally to the body axis of anterior segments just under the posteriorly elongated dorsal part of the 7th segment. Consequently, the cremaster is just behind the 7th segment on the abdominal plane. The egg and larvae are similar to those of Dichorragia and Stibochiona, but the head horns of 4th and 5th instars are provided with many distinctive processes, and the 5th instar has a dorsal protuberance on the 3rd abdominal segment. The larvae of earlier stages, at least 1st and 2nd instars ,construct a resting perch with their own frass pellets and silk at the leaf edge of the host plant.