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 Megaphthalmoides unilineatus ( Zetterstedt, 1838 ) [Japanese name: Kiiro-sesuji-funbae] ( Figs 34–37 ) Cordylura unilineata Zetterstedt, 1838: 727 . Type-locality: “Nordlandia…Bjorkvik” [ Norway ]. Material examined. Hokkaido , 3 ♂ , 2 ♀ , Mt. Kurodake ( 1900 m ), Kamikawa , 24.vii. 1996 , leg. M. Iwasa ; 1♂ , Kogen-onsen ( 1300 m ), Mt. Daisetsu , Kamikawa , 21. vii. 2016 , leg. M. Iwasa ; 3 ♀ , same locality, 6 viii. 2016 , leg. M. Iwasa ; 1 ♂ , same locality, 2. viii. 2012 , leg. S. Shinonaga ; 1 ♀ , Ginsendai ( 1500 m ), Mt. Daisetsu , Kamikawa , 5. viii. 1998 , leg. M. Iwasa ; 1 ♀ , Nukabira , 28. vii. 1987 , Tokachi , leg. M. Iwasa ; 1 ♀ , Mt. Tsurugi , Hidaka range, Tokachi , 25. vii. 1978 , leg. M. Iwasa. Diagnosis. This species is medium-sized species and characterized as follows: head yellow except for eyes; postpedicel black in apical two-thirds and yellow in basal one-third ( Fig. 34 ); arista short-haired; thorax yellow with a longitudinal stripe on prescutum to scutum; abdominal tergites yellow and each tergite with a horizontal black line on posterior margin; male sternite V bilobate posteriorly ( Fig. 35 ); male surstyli long, slender, and tapered apically ( Figs 36, 37 ); cerci clothed with strong setulae. Distribution. Europe, Russia (the European part, Siberia, the Far East), North America ( Ozerov and Krivosheina 2014 ), Japan ( Hokkaido ). New to Japan . Body length ( ♂ ♀ ). 5.5–6.0 mm. Remarks. This species is easily distinguished from M. japonicus Ozerov by the characteristics mentioned in the key below.