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.