Key to species of Hoa

1. Juxtal extension arising dorso-basally and strongly bifurcated at apex; lateral stylus with a single row of recurving teeth in the distal half, median stylus short, flattened and with spinose proximal surface (Fig. 2)..................... S. flexuosa Ho

- Juxtal extension arising dorso-basally or ventro-basally and weakly or not bifurcated at the apex; lateral stylus without the recurving teeth and median stylus with smooth proximal surface................................................ 2

2. Juxta irregular, largely membranous, with tip split medially; juxtal extension arising dorso-basally and moderately expanded distally (Fig. 1)........................................................................ S. basiseta Baranov

- Juxta smoothly rounded, partly sclerotized, with a tapering tip; juxtal extension arising ventro-basally, strongly expanded distally (Fig. 5).................................................................... S. membranijuxta sp. nov.