Key to two species of the genus Noonamyia from Hainan

1. Mesoscutum with a pair of yellow median stripes on basal 1/3; wing with a hyaline marginal stripe between R4+5 and M1+2 and a tinged brown umbrella–like spot on r-m (Fig. 2); surstylus with a subuliform and incurved process in posterior view (Fig. 10). .................................................................................................... Noonamyia umbrellata sp. nov.

- Mesoscutum without yellow median stripes except yellow on basal 1/4; wing with a hyaline semicircular apical stripe between R2+3 and M3+4; a tinged brown spoon–like spot on r-m (Fig. 1); surstylus consisting of a short awl–shaped process and a long curved awl–shaped process in posterior view (Fig. 5) ................................................. ...................................................................................................................................... Noonamyia bisubulata sp. nov.