''Cissia eous'', locally known as the brown butterfly ( pt-BR, borboleta marrom), is a butterfly in the family

Nymphalidae The Nymphalidae are the largest family of butterflies, with more than 6,000 species distributed throughout most of the world. Belonging to the superfamily Papilionoidea, they are usually medium-sized to large butterflies. Most species have a re ...

described by

Arthur Gardiner Butler Arthur Gardiner Butler F.L.S., F.Z.S. (27 June 1844 – 28 May 1925) was an English entomologist, arachnologist and ornithologist. He worked at the British Museum on the taxonomy of birds, insects, and spiders. Biography Arthur Gardiner ...

in 1867. It is found in the countries of

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

and

Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...

Biology and phenology

In the moist and shady habitats of several vegetal formations, like secondary forests and coastal forest edges in Brazil, you'll frequently find adults of this species. They're attracted to fermented fruits and other decaying materials.Biezanko, C.D., 1960. ''Satyridae, Morphidae et Brassolidae da zona missioneira do Rio Grande do Sul''. Instituto Agronômico do Sul/Escola de Agronomia'Eliseu Maciel'. Larvae of this species can feed on ''

Poa ''Poa'' is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), a ...

'' plants. Specifically in ''

Poa annua ''Poa annua'', or annual meadow grass (known in America more commonly as annual bluegrass or simply poa), is a widespread low-growing turfgrass in temperate climates. Notwithstanding the reference to annual plant in its name, perennial bio-typ ...

,'' ''

Digitaria sanguinalis ''Digitaria sanguinalis'' is a species of grass known by several common names, including hairy crabgrass, hairy finger-grass, large crabgrass, crab finger grass, purple crabgrass. It is one of the better-known species of the genus ''Digitaria'', ...

'' and ''Stenotaphrum secundatum''.Silva A.G.A., Gonçalves C.R., Galvão D.M., Gonçalves A.J.L., Gomes J., Silva M.N., Simoni L. 1968. Quarto catálogo dos insetos que vivem nas plantas do Brasil, seus parasitos e predadores. Edição ampliada do "3° Catálogo dos insetos que vivem nas plantas do Brasil" de autoria do Prof. A. M. da Costa Lima. Parte II. Insetos, hospedeiros e inimigos naturais. Índice de insetos e 376 índice de plantas. – Ministério da Agricultura, Rio de Janeiro. 622 pp.

References

Euptychiina Butterflies described in 1867 Taxa named by Arthur Gardiner Butler Butterflies of South America {{Satyrini-stub