Tylostega Meyrick, 1894

Liu, Ping & Wang, Shuxia, 2019, Two new species of the genus Tylostega Meyrick, 1894 (Lepidoptera: Crambidae) from China, with a list of all the known species in the world, Zoological Systematics 44 (3), pp. 206-211 : 207

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

Figures

Figures 3–6. Tylostega spp., genitalia. 3. T. longicornuta sp. nov., male genitalia, holotype, slide No. LP18045. 4. Ditto, female genitalia, paratype, slide No. LP18044. 5. T. vittiformis sp. nov., male genitalia, slide No. LP18007. 6. T. serrata Du & Li, 2008, female genitalia, slide No. LP17985. Scale bars: 3, 5=0.5mm; 4, 6=1.0mm.