Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Drusius Cloudywing
Thorybes drusius (W.H. Edwards, [1884])

Family: Hesperiidae
Subfamily: Pyrginae
Identification: Forewing is pointed; lower half of hindwing has white fringe. Upperside is black-brown with very small, clear spots on the forewing. Male has a costal fold containing scent scales on the forewing. Underside is dark brown; hindwing with dark outlines instead of solid bands.
Wing Span: 1 1/2 - 1 3/4 inches (3.8 - 4.5 cm).
Life History: Not reported.
Flight: Several broods from April-August.
Caterpillar Hosts: Cologania angustifolia and other Fabaceae.
Adult Food: Flower nectar including that from Aloysia and Guardiola.
Habitat: Oak woodland, desert grassland, canyons, streamsides.
Range: Local and uncommon. Arizona to west Texas; south into Mexico.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Comments: NULL
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