3. Delia sileni sp. nov.

Figs. 1–6, 26–34.

‘ Delia flavifrons (Zetterstedt) ’; Hennig 1974: 701, 717, 809 (in part: text-fig. 672, plate-figs. 1014 and 1162). Misidentification.

Etymology. The specific epithet ‘sileni’ is a Latin genitive derived from ‘Silene’, the generic name of its host plant.

Description. The adults differ from other species of the Delia pruinosa species group as follows:

Male & female. Differs from D. pruinosa in having hind tibia with apical av-seta normally developed (Fig. 6, arrow).

Male. Sternite IV no wider than sternite V and sternites III–V with lateral setae shorter than in D. pruinosa (Figs. 17, 18); surstyli (Figs. 27, 28) more slender in caudal aspect than seen in other species except D. capdellae sp. nov. (Fig. 37), but in that species the surstyli are more tapering in lateral aspect (Fig. 38); distiphallus (Figs. 30, 31), as also in D. pruinosa (Figs. 13, 14), with paraphallic processes same length as postero-median extension.

Female. Oviscapt (Figs. 32, 33) rather thick, decidedly longer than preabdomen when fully extended; hypoproct much longer than broad, without cuticular pubescence; cerci with several apical setae of moderate and equal strength. Oviscapt overall very similar to that of D. judicariae (Figs. 24, 25), but distinguished by having the basal membranes of segments VII and VIII covered in tiny, weakly pilose scales arranged in transverse bands (Fig. 33).

Material examined. Type material: DENMARK [ZMUC]: S. Zealand: Holtug Kridtbrud, Stevns Klint, holotype 3, paratypes 93, 7Ƥ, on Silene nutans 5.vi.1996 (V. Michelsen). Other material: CZECH REPUBLIC [ZMUC]: Moravia: Mrsklesy, 1Ƥ 15.v.1974 (Barabás). FINLAND [FMNH, ZMUC]: Regio aboensis: Naantali, 23 [no date], 13 14.vi.1936, 13 5.vii.1955 (L. Tiensuu); Turku, 13 18.vii.1947 (Thuneberg); Satava Is., 13 9.vi.2005 (K. Winqvist). ITALY: South Tyrol: Stilfser Joch [= Stelvio Pass], 2757m, 2Ƥ 12.vii.1997 (S. Andersen). SPAIN [ZMUC]: Santander: Fuenta Dé, 13 18.vi.1983 (R. Hall); Lerida: 1km S Túnel Viella, 1300m, 13 22.vi.1982 (Andersen, Lyneborg & Michelsen); Gerona: Queralps, 1200–1300m, 13 13–17.vi.1982 (Andersen, Lyneborg & Michelsen); 13 11–12.vii.1984, 23 17–20.vi.2002, 1Ƥ 10.vi.2007 (V. Michelsen). TURKEY [ZMUC]: Izmir: Bergama–Kozak rd., 700m, 33, 3Ƥ 10–12.v.1993 (V. Michelsen).

Distribution. Czech Republic, Denmark, Estonia (Hennig 1974, “Dorpat” [= Tartu]), Finland, Italy, Spain, Turkey.