U.S. postal stamps
Maria Sibylla Merian (1647-1717), a painter of flora and fauna, was one of the first naturalists to have observed insects directly from nature. She was a pioneer in the study of how caterpillars become butterflies and moths, which was still a mystery at the time. Her large folio volume http://archive.org/details/Metamorphosisin00Meri depicting on its first plate Cockroaches on a Flowering Pineapple (above), was considered the most outstanding work on insects of its day.
botanical illustration, insects, U.S. postal stamps, Maria Sibylla Merian