Microprosopa haemorrhoidalis ( Meigen, 1826 )

Iwasa, Mitsuhiro, 2021, Three new species and six new records of Scathophagidae (Diptera) from Japan with a key to the Japanese genera, Zootaxa 4981 (3), pp. 531-553 : 547-548

Microprosopa haemorrhoidalis ( Meigen, 1826)

[Japanese name: Miyama-hoso-funbae]

( Figs 44–48 )

Cordylura haemorrhoidalis Meigen, 1826: 237 . Type-locality: “ Schweden ”.

Cordylura pallipes ( Zetterstedt, 1838) : 732. Type-localities: “Lapponia; Scania ” [ Sweden].

Cordylura lividepes Zetterstedt, 1848: 2042 . Type-locality: “Lapponia Lulensi ad Qvickjock” [ Sweden].

Material examined. Hokkaido , 3♂, Mt. Kaundake-Tenninkyo, Mt. Daisetsu-zan, 28. vii. 1983, leg. M. Iwasa.

Diagnosis. This species is comparatively smaller-sized species and characterized as follows: frons black in anterior and posterior parts and yellow in central part; postpedicel black; arista pubescent; thorax black with grey dusting; katepisternum ( Fig. 44 ) with a single seta; fore tibia ventrally with a row of short black spines ( Fig. 45 ); abdominal tergites black and subshiny; legs yellow; posterior lobes on male sternite V tapered apically and curved inward ( Fig. 46 ); male surstyli broad, tapering apically in lateral view ( Figs. 47 ); male cerci covered with setulae, apically close to each other ( Fig. 48 ).

Body length (♂ ♀). 5.5–5.6 mm.

Distribution. Europe, Russia (The European part, Siberia, the Far East), North America ( Bagachanova et al., 2016), Japan (Hokkaido). New to Japan.

Remarks. This species can be easily distinguished from other known species of the Microprosopa by having posterior lobes on sternite V which are tapered apically and curved inward, and broad surstyli in posterior view in male.

Figures

FIGURES 44–48. Microprosopa haemorrhoidalis (Meigen). 44, Katepisternum, left lateral view; 45, Male tibia, left anterior view; 46, Male sternite V, ventral view; 47, Male terminalia, left lateral view; 48, Male terminalia, posterior view.