Diglyphus pachyneurus Graham

Hansson, Christer & Navone, Paolo, 2017, Review of the European species of Diglyphus Walker (Hymenoptera: Eulophidae) including the description of a new species, Zootaxa 4269 (2), pp. 197-229 : 204

Diglyphus pachyneurus Graham

Figs 25, 26 , 39 , 63, 64 , 76 , 78

Diglyphus pachyneurus Graham, 1963: 176 , holotype male in Oxford, not examined.

Diagnosis. Scape completely dark ( Figs 63, 64 ); legs ( Fig. 39 ): femora dark and metallic with apical ¼–⅓ white; tibiae white; fore wing speculum with a few scattered setae (as in Fig. 72 ); male wings with yellow veins that are distinctly enlarged ( Fig. 76 ); male gaster completely dark and metallic ( Fig. 26 ).

Material. Denmark: 1♀ ( BMNH) . France: 5♀ ( BMNH) . Iraq: 5♀ 2♂ ( BMNH) . Sweden: 6♀ 3♂ ( BMNH) .

Distribution. Croatia ( Bouček 1977), Denmark *, France *, Germany ( Vidal 2001), Italy ( Bouček & Askew 1968), Moldova ( Bouček 1965), Montenegro ( Bouček 1977), Netherlands ( Gijswijt 2003), Iraq *, Peoples' Republic of China ( Sha et al. 2007), Russia ( Yefremova 2002), Sweden ( Graham 1963), Turkey ( Gencer 2009), United Kingdom ( Graham 1963), Yemen (Yefremova 2007).

Remarks. Bouček & Askew (1968) referred to the biology of D. pachyneurus as “found on sand-dunes in Britain”. The specimens from Denmark and Sweden examined here are all from areas with sand-dunes so this appears to be the favoured habitat for this species.

Figures

FIGURE 78. Diglyphus spp., schematic drawings of femora + tibiae from top to bottom: fore, mid and hind leg; scape + pedicel. Species are arranged according to colour of the scape, from pale to dark, and then according to colour of the legs, also from pale to dark.

FIGURES 17 – 30. 17 – 28, Diglyphus spp., length of body, habitus in dorsal view: 17, D. sabulosus Erdös female, 1.6 mm; 18, D. sabulosus male, 1.5 mm; 19, D. begini (Ashmead) female, 1.7 mm; 20, D. begini male, 1.1 mm; 21, D. chabrias (Walker) female, 2.1 mm; 22, D. chabrias male, 1.6 mm; 23, D. eleanorae Graham female, 1.6 mm; 24, D. eleanorae male, 1.5 mm; 25, D. pachyneurus Graham female, 1.9 mm; 26, D. pachyneurus male, 1.6 mm; 27, D. propodealis Szelényi female holotype, 1.5 mm; 28, D. subplanus (Erdös) female, 1.3 mm. 29 & 30. Stigmal vein: 29, D. chabrias; 30, D. propodealis.

FIGURES 37 – 42. Diglyphus spp., length of body, female habitus in lateral view: 37, D. isaea (Walker), 1.7 mm; 38, D. minoeus (Walker), 1.8 mm; 39, D. pachyneurus Graham, 1.9 mm; 40, D. poppoea Walker, 1.2 mm; 41, D. sabulosus Erdös, 1.7 mm; 42, D. pusztensis (Erdös & Novicky), 1.4 mm.

FIGURES 61 – 71. Diglyphus spp., head & antenna in lateral view: 61, D. minoeus (Walker) female; 62, D. minoeus male; 63, D. pachyneurus Graham female; 64, D. pachyneurus male; 65, D. poppoea Walker female; 66, D. poppoea male; 67, D. pusztensis (Erdös & Novicky) female; 68, D. pusztensis male; 69, D. sabulosus Erdös female; 70, D. sabulosus male; 71, D. subplanus (Erdös) female.

FIGURES 72 – 77. 72 – 73, Diglyphus spp., right fore wing, females: 72, D. chabrias (Walker); 73, D. isaea (Walker). 74 – 77, Diglyphus spp., right wing-pair, males: 74, D. anadolucus Doganlar; 75, D. crassinervis Erdös; 76, D. pachyneurus Graham; 77, D. clematidis sp. nov.