Butterflies of the
Amazon and Andes
Family - HESPERIIDAE
subfamily - PYRGINAE
Tribe - ERRYNINI
Mylon maimon, Rio Madre de Dios, Peru ©
The 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
The illustrated butterfly Mylon maimon
is a distinctive and easily recognised species. In some reference
books it is listed under the invalid synonyms
Mylon menander or M. menippus.
The genus Mylon contains 15 known
species, all with the same characteristic wing shape and pale
greyish-white ground colour. Some species are faintly marked, while
others are quite heavily marbled with dark brown.
Mylon maimon is probably the most
widespread species, found from Colombia to Bolivia.
This species occurs at elevations from sea level to about 1800m, in
semi-open situations within forested areas. It is usually seen along
wide sunlit tracks, or forest edge habitats.
When fully grown the larva is dark green with a pair of broken
bright yellow sub-dorsal bands. The head is white, with 2 large
black spots above, and 3 smaller black spots below. It feeds
nocturnally on Hiraea,
Mascagnia and other Malpighiaceae. It lives solitarily within
a leaf shelter constructed by cutting and folding a leaf of the
foodplant. The pupa is green, with a pair of fake ocelli on the
Both sexes bask on bushes or low herbage, with wings outspread. Males
are seen more frequently, usually when imbibing moisture from around
the edges of muddy puddles, or from damp ditch beds where there is a
lot of decaying vegetation.