Macalla thyrsisalis, the mahogany webworm moth, is a species of snout moth in the genus Macalla. It was described by Walker in 1859. It is found in southern Florida, the Bahamas, Hispaniola, southern Mexico, Central America, Trinidad and the Amazon Delta in Brazil. Adults have a dull, brown body and forewings, the latter with indistinct bands. The dorsal surface of the hindwings is off-white with brown outer margins. Adults are on wing in spring.