Ms. Couri et Cje. Lamas, REVISION OF YLASOIA-SPEISER, 1920 (INSECTA, DIPTERA, BOMBYLIIDAE, LOMATIINAE), Proceedings of the Biological Society of Washington, 106(3), 1993, pp. 450-454
Ylasoia Speiser, 1920 is redescribed and the known neotropical species
, are revised, based on examination of the types. Y. abbreviata (Wiede
mann), 1830 and Y caloptera (Macquart), 1834 are synonymized with Y. p
egasus (Wiedemann), 1828, the type species of the genus.