Onespa, Steinhauser, 1974

Austin, George T. & Warren, Andrew D., 2009, New looks at and for Onespa, Buzyges, and Librita (Lepidoptera: Hesperiidae: Hesperiinae), with new combinations and descriptions of a new genus and six new species, Insecta Mundi 2009 (89), pp. 1-55 : 16

Key to male Onespa

1. Large, forewing length> 18 mm, with mesotibial spines ............. O. nakamura , new species

— Smaller, forewing length <18 mm, without mesotibial spines ................................................... 2

2(1). Ventral hindwing red-brown .................................................................. O. nubis Steinhauser

— Ventral hindwing not red-brown (olive- to orange-brown) .......................................................... 3

3(2). Dorsal forewing macules narrow and not forming continuous postmedial band, ventral hindwing olive-brown, single rigid cornutus .............................................................. O. gala (Godman)

— Dorsal forewing macules broad and forming nearly continuous postmedial band, ventral hindwing orange-brown, two rigid cornuti ................................................ O. brockorum , new species