Oedalea vietnamensis, Shamshev, 2020

Shamshev, I. V., 2020, First record of the genus Oedalea Meigen (Diptera: Hybotidae) from Vietnam, with description of a new species and a key to species of the Oriental Region, Russian Entomological Journal 29 (2), pp. 218-221 : 220-221

KEY TO SPECIES OF OEDALEA MEIGEN FROM THE ORIENTAL REGION

1. Vein M 2 incomplete, not reaching wing margin; postpedicel brownish yellow ( China: Guangdong) .............. ................................ O. nanlingensis Yang et Grootaert

— Vein M 2 complete, reaching wing margin; postpedicel blackish ........................................................................ 2

2. Palpus yellowish; halter pale ( Myanmar) ...................... ......................................................... O. longicornis Frey

— Palpus black; halter at least with knob darkened ........ 3

3. Antennal stylus uniformly stout; pterostigma elongate oval, lower margin extending slightly beyond middle of distance between costa and R 2 +3 ( China: Henan) ........... ............................. O. baiyunshanensis Saigusa et Yang

— Antennal stylus slender, with seta-like apical segment; pterostigma subrectangular, broader, lower margin almost touching to R 2+3 (north-western Vietnam) ............ .................................................... O. vietnamensis , sp.n.

Acknowledgments. I am indebted to Andrey Ozerov (ZMMU) for the loan of specimens used in this study. This study was performed within the frames of the Russian State Research Project no. AAAA-A19-119020690101- 6 and was supported by the Russian Foundation for Basic Research (grant no. 18-04-00354A).