Butterflies of the
Amazon and Andes
Family - HESPERIIDAE
subfamily - PYRGINAE
Tribe - PYRGINI
Pachyneuria duidae pozuza,
Tingo Maria, Peru ©
Pyrginae, popularly known as Flats or Spreadwings, are a
cosmopolitan subfamily distributed across temperate and tropical
habitats throughout the world. In the Americas there are 990
species, of which about
580 are assigned to the tribe Pyrgini.
There are 11
Pachyneuria species, distributed
variously from Mexico to Brazil and Peru. The adults are all very
similar in appearance, with the exception of
obscura, which has very dark veins but is otherwise almost
devoid of markings.
is distributed from
Venezuela to Peru.
This species is found in tropical and subtropical evergreen
rainforest at altitudes between about 400-1000m.
I have no information regarding Pachyneuria,
but Pyrgine butterflies typically lay their eggs singly on either
the upperside or underside of leaves. The larvae are usually dull
green or brownish, with thin longitudinal dorsal and lateral lines,
and dark shiny heads, although some species are quite strikingly
marked. Most Pyrgine larvae feed on herbaceous plants, but a small
percentage feed on the leaves of bushes or trees. The pupae are
generally dark and smooth, with the wing cases in a contrasting tone
or colour. They are usually formed within silken tents formed by
spinning together the leaves of the foodplant.
Pachyneuria are generally encountered as
solitary males, seen imbibing mineralised moisture from river beaches.