Systematic study of the subgenus Aphantorhaphopsis of the genus Siphona in East Asia and the Oriental Region (Diptera: Tachinidae) Author Tachi, Takuji Biosystematics Laboratory, Faculty of Social and Cultural Studies, Kyushu University, Motooka 744, Fukuoka 819 - 0395, Japan; Author Shima, Hiroshi Kyushu University Museum, Kyushu University, Hakozaki, Fukuoka, 812 - 8581 Japan text Acta Entomologica Musei Nationalis Pragae 2023 Acta. Ent. Mus. Natl. Pragae 2023-08-31 63 1 213 247 http://dx.doi.org/10.37520/aemnp.2023.013 journal article 10.37520/aemnp.2023.013 1804-6487 10134105 3256463E-FEA1-4BA2-AB4D-4161FA1138C4 Siphona ( Aphantorhaphopsis ) matsumotoi sp. nov. ( Figs 25–29 , 91 ) Type material examined. HOLOTYPE : J ( BLKU ), [KYUSHU] / Fukuoka / Mt.Raizan / 17.ix.1995 / R. Matsumoto . PARATYPES : JAPAN : SHIKOKU: 1 J, Mount Odamiyama, Oda Town, Ehime Prefecture , 14.vii.1998 , T. Tachi; 1 ♀ , Mt.Takanawa, Hojyo City, Ehime Prefecture , R. Matsumoto; 1 J, Yanase, Umaji Village, Kochi Prefecture , 6.vii.1996 , M. Sueyoshi. KYUSHU: 4 JJ, same data as holotype ; 1 J, Takayama, Ebino City, Miyazaki Prefecture , 22.v.1996 , M. Sueyoshi; 1 ♀ , Miike, Miyazaki Prefecture , T. Tachi (all in BLKU). Diagnosis. Fronto-orbital plate with yellowish pruinosity and with row of short setae; 3 postsutural dorsocentral setae; abdomen with whitish pruinosity on narrow anterior margins of tergites 3–5; male postabdomen with surstylus thickened and slightly curved dorsally in apical 1/ 5 in lateral view. Description. Body length 3.7–4.0 mm. Male. Head whitish in ground color; fronto-orbital plate with yellowish pruinosity; frontal vitta light yellow; antenna with scape and pedicel orange; postpedicel and arista brownish; palpus yellow. Vertex 0.31–0.33 of head width; parafacial much narrower than width of 2nd arisotmere at middle height; gena 0.18–0.20 of eye height; anterior reclinate orbital seta situated posterior to middle of fronto-orbital plate; fronto-orbital plate with a row of short setae; antenna with postpedicel subrectangular, 2.0–2.3 times as long as wide and approximately 5 times as long as pedicel; 2nd aristomere 2–3 times as long as wide; 3rd aristomere thickened in basal 2/5 and tapered to apex; palpus clavate; prementum 4–5 times as long as wide and 0.42–0.55 times as long as eye height; labella pad-like. Thorax. Dorsum gray in ground color, with yellowish pruinosity; postpronotal lobe light yellow in ground color, with whitish pruinosity; apical half of scutellum yellowish; pleura brownish, with whitish gray pruinosity. Three postsutural dorsocentral setae. Wing. Tegula black; basicosta light yellow. Relative lengths of costal sectors two, three and four approximately Figs 20–24. Male and female postabdomen of Siphona ( Aphantorhaphopsis ) laboriosa Mesnil, 1957 (Myanmar, Kambaiti). 20 – epandrium, cerci and surstylus in lateral view; 21 – epandrium, cerci and surstylus in dorsal view (setae omitted on left side); 22 – hypandrium, pregonite, postgonite and phallus in lateral view; 23 – fifth abdominal sternite in ventral view (setae omitted on left side); 24 – female postabdomen in lateral view. Scale bars = 0.1 mm. Figs 25–29. Male and female postabdomen of Siphona ( Aphantorhaphopsis ) matsumotoi sp. nov. (paratype, Japan). 25 – epandrium, cerci and surstylus in lateral view; 26 – epandrium, cerci and surstylus in dorsal view (setae omitted on left side); 27 – hypandrium, pregonite, postgonite and phallus in lateral view; 28 – fifth abdominal sternite in ventral view (setae omitted on left side); 29 – female postabdomen in lateral view. Scale bars = 0.1 mm. 2: 12: 5; ultimate section of M 4 0.35–0.38 times as long as penultimate section and subequal in length to crossvein dm-m; R 1 bare. Legs orange in ground color; tarsi brownish. Abdomen brownish in ground color, with whitish pruinosity on anterior 1/10 of tergites 3–5; tergites 3–5 with black median longitudinal vitta. Syntergite 1+2 without lateral marginal setae; tergite 3 with pair of lateral and median marginal setae; sternite 5 with pair of relatively rounded median lobes on inner edge. Male postabdomen. Surstylus thickened in lateral view, apex slightly curved dorsally, with many strong inner setae; cerci curved dorsally in middle in lateral view, apex curved ventrally; pregonite pointed apically in lateral view, without seta; postgonite not bifurcated apically, pointed apicoventrally; distiphallus mostly sclerotized in lateral view with tiny spinules ventrally. Female. Similar to male, but differing as follows: gena narrower, approximately 0.16 of eye height; antenna with postpedicel slender, approximately 3.3 times as long as wide. Female postabdomen as in S . ( A .) laboriosa . Etymology. This species is named in honor of Dr. R. Matsumoto ( Osaka Museum of Natural History), who collected the holotype . Host. Unknown. Distribution. Japan (Shikoku, Kyushu).