Papillons: Butterflies Folios, Set of 20 limited edition prints (1928). E A Séguy. Limited Edition Print, Pochoir. Eugène Séguy (French, 1890–1985) was a entomologist who specialised in Diptera and designer at the beginning of the 20th century. Working in both the Art Deco and Art Nouveau styles, he published many design folios utilizing the pochoir technique, a printing process that employs a series of stencils to lay dense and vivid color.