Genus Tylostega Meyrick, 1894

Tylostega Meyrick, 1894 . Type species: Tylostega chrysanthes Meyrick, 1894, by original designation.

Key to Chinese species of Tylostega based on male genitalia.

1. Posterior margin of juxta concave, protruding posterolaterally............................................................................................................ 2

Posterior margin of juxta not concave..................................................................................................................................................4 2. Phallus with two cornuti (Du & Li, 2008: fig. 12) ................................................................................................................. T. serrata

Phallus with three cornuti..................................................................................................................................................................... 3 3. Phallus with two short and one longer spine-like cornuti (Du & Li, 2008: fig. 8) ........................................................... T. tylostegalis

Phallus with two Y-shaped and one spine-like cornuti (Fig. 5) ............................................................................ T. vittiformis sp. nov. 4. Juxta with strong hornlike or fingerlike process ..................................................................................................................................5

Juxta without above mentioned process (Fig. 3) ............................................................................................. T. longicornuta sp. nov. 5. Juxta with strong hornlike process lateromedially (Du & Li, 2008: fig. 10) ..................................................................... T. luniformis

Juxta with strong fingerlike process posterolaterally, phallus with two spine-like cornuti................................................................... 6 6. Phallus with one more pectinate cornutus (Du & Li, 2008: fig. 9) ...................................................................................... T. pectinata

Phallus with one more broadly boardlike cornuti (Du & Li, 2008: fig. 11).................................................................................. T. lata