Psyllaephagus longifuniculus Xu, 2000

Zou, Boyu, Hu, Hongying, Zhang, Lanwei & Zhang, Yanzhou, 2023, A taxonomic study of Psyllaephagus Ashmead (Hymenoptera, Encyrtidae) from China, ZooKeys 1184, pp. 327-359 : 327

Psyllaephagus longifuniculus Xu, 2000

Fig. 12

Psyllaephagus longifuniculus Xu, in Xu et al. 2000: 40. Holotype ♀, Shaanxi (ZUIE), examined by YZZ.

Material examined.

China - Shanxi • Holotype ♀, Wugong, 21.Aug.1954, Dept. Plant Protection, Northwest Agric. Univ., ex. Thysanogyna limbata , C5526-1a (ZUIE); China - Zhejiang • 6♀♀, Lishui, 16.Jun.1981, leg. DX Liao; Beijing • 8♀♀, 5♂♂, 11.Nov.1995, ex. Thysanogyna limbata , leg. YZ Zhang; 9♀♀, 13♂♂, 09.Jun.2017, ex. Thysanogyna limbata , leg. YZ Zhang.

Diagnosis.

Female. All coxae dark brown; F1 at least as long as or slightly longer than pedicel; F1-F5 obviously longer than broad, F6 slightly longer than broad or subquadrate (Fig. 12A ); OL ~ 1.5 × MT.

Description.

Female. Body length ~ 2.2 mm, with blue green sheen; basal 1/2 of tegula pale yellow, the rest dark brown; antenna completely dark brown; all coxae dark brown; hind femur dark brown, but apical ~ 2/5 yellow; wings hyaline, venation brown (Fig. 12B ).

Head with reticulate sculpture, HW ~ 3.0 × HL in dorsal view, 2.9 × as wide as frontovertex; ocellus forming an obtuse triangle, angle slightly more than 90°; OCL ~ 0.8 × diameter of posterior ocellus; OOL ~ 1.1 × diameter of posterior ocellus; POL ~ 4.0 × diameter of posterior ocellus; mandible with one tooth and a broad truncation; antenna with scape slightly expanded and ~ 4.8 × as long as wide; pedicel ~ 1.8 × as long as wide; F1-F5 longer than broad, F6 quadrate; clava 3-segmented, approximately as long as F4-F6 combined, nearly 3.0 × as long as wide (Fig. 12A ). Relative measurements: SL 14.4; SW 3.

Mesoscutum slightly convex; mesoscutum and scutellum with reticulate sculpture similar to that on frontovertex; MSW ~1.5 × MSL, and the center of the posterior margin protrudes backward to cover junction of axillae; marginal vein subquadrate, slightly longer wide, stigmal vein ~ 6.5 × as long as wide, postmarginal vein ~ 2.7 × as long as wide, PMV ~ 0.4 × STV; mid tibia spur 0.9 ×-as long as basitarsus. Relative measurements: FWL 64; FWW 27.

Metasoma slightly shorter than mesosoma; cercal plates located at the halfway point of the metasoma; hypopygium with apex reaching ~ 2/3 of metasoma; ovipositor not exserted; OL ~ 5.3 × GL, and 1.2 × MT.

Male. Body length ~ 1.6 mm; generally similar to female except color and structure of antenna, antenna pale brown, scape and pedicel short, funicular segments protrude laterally, clava unsegmented (Fig. 12G ).

Variation.

In P. longifuniculus , a little variation was found in lengths of F1 and F6: F1 is not always shorter than the pedicel, sometimes it is ~ 1.1 × as long as pedicel; F6 is sometimes quadrate (Fig. 12A ).

Host.

Thysanogyna limbata Enderlein, 1926 ( Hemiptera : Carsidaridae ).

Distribution.

China (Beijing, Shaanxi, Zhejiang).

Figures

Figure 12. Psyllaephagus longifuniculus A antenna ♀ B fore wing ♀ C fore leg ♀ D mid leg ♀ E hind leg ♀ F ovipositor ♀ G antenna ♂.