Detail of wings of the holotypes of Spilosmylus species described by Nathan Banks from the Philippines. Photographs by Philip D. Perkins, Museum of Comparative Zoology, Harvard University; original photography © President and Fellows of Harvard College. A Spilosmylus alticolus Banks, 1937 B Spilosmylus formosus Banks, 1924 C Spilosmylus apoanus Banks, 1937 D Spilosmylus proximus Banks, 1937 E Spilosmylus monticolus (Banks, 1937).