Ctenophorinia grisea Mesnil, 1967

Shima, Hiroshi, Abe, Tomokazu & Libra, Martin, 2021, Tachinid flies (Diptera: Tachinidae) reared from deciduous plant-feeding lepidopteran larvae at Hokkaido University Tomakomai Forest (Japan), with descriptions of three new species, Zootaxa 5060 (2), pp. 275-295 : 283-284

Ctenophorinia grisea Mesnil, 1967

( Figs 26 , 37–38 )

Diagnosis. A medium to large-sized exoristine tachinid. Eye hairy; parafacial bare; facial ridge with setae on lower 3/4 or more; antenna large, 2nd aristal segment at most 2 times as long as wide; 3 presutural and 4 postsutural dorsocentral setae; wing veins bare except for base of vein R 4+5 with 2–3 short and fine setulae; wing vein M with a rather weak wrinkle at bend; abdomen without discal setae even on 5th tergite; mid coxa of female with 5–6 rather short and strong spines; male cerci broad on basal 4/5 and strongly narrowed to apex.

Description of puparium ( Figs 37–38 ). Length ca. 9.0– 9.2 mm, width 0.49–0.50 mm. Brown, barrel-shaped; surface with small wrinkles; posterior spiracles shining dark brown, nearly flat on posterior surface of posterior surface, rather circular with inner margin weakly curved; cicatrix (button) nearly at middle of spiracular plate; spiracular slits absent, but many tiny spots recognizable on spiracular plate.

Specimens examined*. 1 female, Japan Hokkaido, Tomakomai, Tomakomai Experimental Forest , 7.vii.2014 (emerged), ex Himeropteryx miraculosa, M. Libra & T. Abe ( TOC 11405) ( HUM) ; 1 male, same data as preceding except date, 10.vii.2015 ( TOC 11737) ( KUM) .

Host. Lepidoptera , Notodontidae : Himeropteryx miraculosa Staudinger.

Remarks. Members of this genus are oviparous. This species was described by Mesnil (1967: 43) from Sapporo, Hokkaido, Japan and later recorded from Amur, Russia (Ziegler & Shima 1969). The female has peculiar peg-like spines on the ventral surface of the mid coxa, which may assist with oviposition on host caterpillars. This species appears to be a solitary parasitoid; it pupates within the dead host caterpillar and ecloses from it. The present record is the first reported host for this species.

Figures

FIGURES 26–34. Adults of Ctenophorinia grisea Mesnil (Hokkaido, Japan), Blepharipa carbonata Mesnil (Hokkaido, Japan), Cyzenis spp. and Eulasiona zimini (Mesnil). 26. Ctenophorinia grisea Mesnil, habitus in lateral view. 27. Blepharipa carbonata Mesnil, habitus in dorsal view. 28–29. Cyzenis equifacialis sp. nov. (paratype male, Hokkaido, Japan). 28. Habitus in lateral view. 29. Male head in lateral view. 30–31. Cyzenis tetrasetosa sp. nov. (paratype male, Hokkaido, Japan). 30. Habitus in lateral view. 31. Head in lateral view. 32–34. Eulasiona zimini (Mesnil) (Hokkaido, Japan). 32. Female habitus in lateral view. 33. Female head in lateral view. 34. Male head in lateral view.

FIGURES 35–44. Puparia. 35–36. Blepharomyia brevicornis sp. nov. (paratype, Hokkaido, Japan). 37–38. Ctenophorinia grisea Mesnil (Hokkaido, Japan). 39–40. Cyzenis equifacialis sp. nov. (paratype, Hokkaido, Japan). 41–42. Cyzenis tetrasetosa sp. nov. (paratype, Hokkaido, Japan). 43.44. Eulasiona zimini Mesnil (Hokkaido, Japan). 35, 37, 39, 41, 43. Lateral view. 36, 38, 40, 44. Posterior apex in lateral or posterior view.