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Butterflies of the Amazon and Andes
Hewitson's Sailor
Dynamine sosthenes  HEWITSON, 1869 
Family - NYMPHALIDAE
subfamily - BIBLIDINAE
Tribe - EUBAGINI
subtribe - EUBAGINA
Dynamine sosthenes, Satipo, Peru Adrian Hoskins
Introduction
The Biblidinae are known for their diverse but simple and colourful patterns. In the neotropics their representatives include the subtribe Eubagina, within which are placed the 40 Dynamine species.
Most Dynamine species have metallic bluish or greenish uppersides, with a dark apex, and a series of white spots. Some species however are white, with black markings. The undersides of most species are white, attractively marked with narrow bands of orange - and in some species also with conspicuous ocelli and small patches of metallic blue scales.            
The greatest diversity of species is found in the Amazon basin, but the distribution of the genus ranges from Mexico to Bolivia.
Dynamine sosthenes is one of the most widespread species, being found from Nicaragua to Peru.
Habitats
This species is found in forested areas at altitudes between sea level and about 1000 m.
Lifecycle
The eggs of most Dynamine species are white. They are laid singly on the leaf axils or flower buds of Euphorbiaceae genera such as Tragia and Dalechampia. The larvae are described by DeVries as being slug-like, with tiny rosettes of spines on the back. The pupae are greenish, elongate, with a slightly bifid head and a pronounced dorsal keel, and suspended by the cremaster from stems or leaves.
Adult behaviour

The butterflies are only active in hot sunny conditions, when they can be seen flying rapidly in zig-zag fashion along sunny tracks in the mornings. During the afternoon males visit dry river beds, well vegetated rocky river beaches, roadside ditches and damp ground along sunlit forest tracks.

The wings are normally held erect when feeding, but they periodically flick them open and shut as they flit about from spot to spot on the ground, probing for mineral-rich moisture.

In cooler conditions both sexes also bask on low foliage, with wings half open.

 

 

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