Introduction
There are 1100 known species of Satyrinae in the neotropical region. About 570 of these are placed in the subtribe Pronophilina – a diverse group of high altitude cloudforest butterflies, all of which are confined to the neotropical region. The vast majority are found only in the Andes, but 4 species are known from the Atlantic cloudforests of Brazil, and there are a further 6 species that are endemic to Guatemala, Costa Rica or Mexico. More oddly there is one genus Calisto that is found exclusively on the Caribbean islands of Cuba and Hispaniola.
The genus Pronophila comprises between 15-20 species dependent on taxonomic interpretation. The wings of all species are dark brown above, with a series of white or orange sub-apical markings. On the underside they are marbled in shades of grey and brown, and are adorned with a series of large submarginal ocelli, although these are vestigial in some species.
Pronophila epidipnis is quite variable in appearance – some examples being brownish while others are noticeably grey on the underside. The ocelli and other markings on the hindwings are also quite variable in intensity and contrast.
Pronophila epidipnis is found in Colombia, Venezuela, Ecuador and Peru.
Habitats
This is a cloudforest species found at altitudes between about 1600-2600m.
Lifecycle
The lifecycle appears to be unrecorded. The following generalisations are applicable to the subtribe Pronophilina and are probably applicable to Pronophila: The eggs are round, white or pale greenish white, and laid singly on the foodplants or on surrounding vegetation. The larvae are typically pale brown, marked along the back and sides with narrow dark stripes, and tapering towards each end. The head is large in proportion to the body and has two short forward-pointing horns. The tip of the abdomen is equipped with a pair of caudal prongs which are used to flick the frass away from the feeding area. The larvae of all known Pronophilina feed on Chusquea – a genus of bamboo which grows in thickets, mainly along the courses of streams.
Adult behaviour
Males can be found visiting carrion and dung, or imbibing mineralised moisture from boulders and stones along roadsides in forested areas.