Three new species and six new records of Scathophagidae (Diptera) from Japan with a key to the Japanese genera Author Iwasa, Mitsuhiro text Zootaxa 2021 2021-06-08 4981 3 531 553 journal article 5897 10.11646/zootaxa.4981.3.6 e602c4fe-7400-4287-b3f5-62fecf81f369 1175-5326 4921413 6416487B-1776-4BA5-AFB5-6D382C1940D4 Key to the species of Japanese Acerocnema (male and females) 1. R 1 of wing with dorsal setulae on apical portion............................................................. 2 - R 1 of wing without dorsal setulae on apical portion........................................................... 3 2. Prescutum, scutum and scutellum mostly grey microtrichose, with a pair of shiny stripes on scutum ( Fig. 1 ); male surstylus anterodistally dilated ( Fig. 4 )............................................................... A. incisa sp. nov. - Prescutum, scutum and scutellum mostly shiny; male surstylus sinuate and tapering apically (see Iwasa (2014 , figs 13, 14))........................................................................................ A. sinuata Iwasa 3. Frons yellow; scutum longitudinally with a central grey microtrichose band; male surstylus filiform (see Iwasa (2014 , figs 8, 9)).................................................................................. A. flavifrons Iwasa - Frons black; scutum wholly shining; surstylus clavate (see Iwasa (2014 , figs 2, 3))................ A. kishimotoae Iwasa