Diplazon angustus Dasch 1964a

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 36-37

Diplazon angustus Dasch 1964a

Diplazon bachmaieri Diller 1986 (syn. nov.)

Diagnosis. Fore wing length 5.2–6.5 mm. Antenna of both sexes with 16–18 flagellomeres. Face with punctures clearly distinct from the background sculpture, at least centrally. Mesopleuron smooth and shining and strongly punctate also on upper half. Propodeum with a full set of carinae enclosing basal, lateral and petiolar areas. Tergite 1 0.95–1.15, tergite 2 0.6–0.7 times as long as wide; tergites 2 and 3 with obvious coriaceous sculpture between the rather indistinct punctures, this sculpture often extending across transverse impressions. Transverse impressions deep on tergites 1 to 2, often still distinct on tergite 3 and sometimes indicated on tergite 4. Metasoma dorsoventrally depressed.

Colouration of females. Antenna dark brown. Head and mesosoma black, face with yellow along inner orbits, without yellow central face patch, yellow on clypeus and mouthparts, hind corner of pronotum, tegula, only rarely a spot on subtegular ridge, small shoulder mark, upper mesepimeron; scutellum with a yellow tip. Legs orange, coxae black with a tinge of orange or entirely orange, in which case at least the trochanters are dark; femora orange; hind tibia narrowly white between the dark basal and apical bands, hind tarsus dark. Metasoma black.

Colouration of males. As in females but with yellow ventrally on scape and pedicel, entire face, subtegular ridge and some irregular area around epicnemial carina. Fore and mid coxae yellow. Tergites 1 to 3 sometimes with posterior margins dark orange.

Material examined. Holotype and paratype of Diplazon bachmaieri Diller : Switzerland, Valais, Sierre , 500m, leg. E.Diller, 1.VIII.1977 . 2♀, at ZSM. Paratypes of Diplazon angustus Dasch : USA, Alaska, Mt. McKinley, 2500', leg. David Townes, 6.VIII.1954. 1♀, at AEI . USA, California, Yosemite National Park, Tuolumne Meadows, leg. A.D. Telford, VIII.1959. 1♀, at USNM .

New for Austria: Tirol, Königstal, Obergurgl, 2000m, leg. Fitton & Day, VII.1981. 2♀, at BMNH. New for France: Col du Lautaret, N45.0225, E06.2142, 5.VIII.1982. 1♀, at ZSM . New for Sweden: Uppland, Älvkarleby kommun, Bätfors. Pine forest w. blueberry., N60°27.639', E17°19.069', leg. SMTP , 27.VI.–01.VII.2004. 1♀, at NRM .

Austria (2), France (2), Germany (1), Russia (1), Sweden (1), Switzerland (12).

Distribution. Holarctic.

Figures. Male terminal sclerites ( Fig. 37 B).

Figures

FIGURE 37. Ninth sternite and ninth and tenth tergites of male Diplazontinae species. A. Daschia brevitarsis. B. Diplazon angustus. C. Diplazon scutatorius. D. Diplazon zetteli. E. Enizemum ornatum. F. Homotropus dimidiatus. G. Homotropus longiventris. H. Homotropus melanogaster. I. Homotropus nigrolineatus. J. Phthorima xanthaspis.