Omphale euphorbiae, Hansson, Christer & Shevtsova, Ekaterina, 2012

Hansson, Christer & Shevtsova, Ekaterina, 2012, Revision of the European species of Omphale Haliday (Hymenoptera, Chalcidoidea, Eulophidae), ZooKeys 232, pp. 1-157 : 49-51

Omphale euphorbiae sp. n. Figures 169-182488513

Material.

Holotype NETHERLANDS: female (RMNH), glued to a card, labelled: "Wessum, 5.vii.1972, H.J. Vlug, ex Bayeria capitigena on Euphorbia esula". Paratypes. 13♀ 11♂: CZECH REPUBLIC: 2♀ "Moravia, 12 km E Boskovice, 11.vi.1996, M.J. Gijswijt" (RMNH). FRANCE: 2♀ "Dept Aisne, Cerny, xerobrometum, 2.vii.1971, M.J. Gijswijt" (RMNH); 1♂ "Dept Aisne, Cerny en Laon, Mont de Fer, 6.vii.1983, M.J. Gijswijt" (RMNH); 1♀ "Hautes Alpes, Arvieux, 8.vii.1990, Brunissard, 1750-1900m, G. Delvare" (RMNH). GREECE: 1♀ "Thesprotias, 6 km SW Igoumenitsa, 13.iv.1998, M.J. Gijswijt" (RMNH); 1♀ "Peloponnesos, Lakonia, Parori, 5 km E Sparti, 3.v.1989, M.J. Gijswijt" (RMNH). NETHERLANDS: 4♀ 2♂ with same label data as holotype (RMNH); 1♀ 7♂ "Wessum, 28.vi.1972, H.J. Vlug, gal Bayeria capitigena on Euphorbia esula, coll. 22.vii.1971" (BMNH, RMNH). SWEDEN: 1♀ “Skåne, Degeberga, 9.vii.1938" (BMNH). UNITED KINGDOM: 1♂ "England, Cambs, Woodwalton fen, 19.vii-28.viii.1978, J.S. Noyes" (BMNH).

Diagnosis.

Thoracic dorsum golden green or metallic bluish green (Figs 170, 171); coxae golden green and femora dark brown metallic (Fig. 169); female gaster elongate, 1.6 –1.9× as long as length of mesosoma (Fig. 169); propodeum with very weak reticulation (Fig. 176). Similar to Omphale phruron but female flagellomeres 2-4 ventrally with two sets of setae (Fig. 177), both sexes with thoracic dorsum bright golden green or bluish green; more (9-12) admarginal setae; female gaster longer, 1.6 –1.9× as long as mesosoma. Male genitalia: phallobase (Fig. 488) with volsellar setae on short extensions and with apex of setae 1.6 × the length of setae from apex of phallobase, digitus 0.7 × as long as wide; aedeagus short and stout (Fig. 488), with penis valves 1.5 × as long as wide.

Description.

Female. Length of body 1.4-2.0 mm. Antenna with scape dark brown with base yellowish brown, pedicel and flagellum dark brown; pedicel + flagellum 1.8 × as long as distance between eyes; first flagellomere 1.1 × as long and 1.2 × as wide as second flagellomere (Fig. 177); flagellomeres 2-4 ventrally with two sets of setae, one attached subbasally and one subapically; clava 2-segmented. Face golden red, reticulate (Fig. 178); clypeus golden green (Fig. 172), smooth, semicircular, 1.9 × as wide as high; gena golden purple to golden red; lower frons golden green, with strong reticulation but smooth below toruli; antennal scrobes join on frontal suture; frontal suture V-shaped; upper frons golden red to golden green, with weak reticulation; vertex golden green inside ocellar triangle, golden red outside, with engraved weak reticulation. Occipital margin rounded.

Mesoscutum golden green (Fig. 170), with engraved reticulation (Fig. 176), midlobe with two pairs of setae; notauli as indistinct impressions in posterior ½. Scutellum golden green (Fig. 170), with engraved reticulation (Fig. 176); 1.0 × as long as wide, with anterior margin almost straight. Axillae golden (Fig. 170). Dorsellum golden (Fig. 170), convex with very weak sculpture (Fig. 176), 0.2 × as long as wide, and 0.6 × as long as length of median propodeum. Entire lateral mesosoma golden green to golden purple (Fig. 169); transepimeral sulcus curved forwards. Propodeum golden green with median part golden red (Fig. 170), with very weak reticulation but smooth medially (Fig. 176); propodeal callus with two setae. Coxae golden green (Fig. 169); femora dark brown metallic; foretibia pale brown, mid- and hind tibiae dark brown; foretarsus dark brown, mid- and hind tarsi with tarsomeres 1-3 yellowish brown and 4 dark brown; midleg with first tarsomere 0.3 × as long as length of tarsus. Forewing transparent with slight infuscation just below stigmal vein, veins yellowish brown (Fig. 174), setae dark brown; speculum closed; admarginal setae 9-12, arising from ventral marginal vein and some from membrane just behind marginal vein; radial cell bare, but with setae in posterior part; postmarginal vein 1.1 × as long as stigmal vein, stigmal vein slender. Hind wing transparent, apex rounded (Fig. 174). Forewing WIP (Fig. 175) blue with margins along foremargin of wing, basal margin and basal ½ of hind margin magenta.

Petiole dark brown. Gaster with tergites 1-5 bluish green metallic with posterior margin golden purple, tergite 6 completely bluish green metallic, tergite 7 completely golden purple, elongate and 1.6 –1.9× as long as length of mesosoma; 7th tergite 0.1 × as long as length of gaster.

Male. Length of body 1.1-1.4 mm. Features as in female except as follows. Antenna with scape golden green with base yellowish brown, pedicel golden green, flagellum dark brown metallic; pedicel + flagellum 1.6 × as long as distance between eyes; flagellomeres 1-4 with verticillate setae and with several scattered setae apical to basal whorl (Fig. 180); clava 1-segmented. Face bluish green metallic (Fig. 173), strigose-reticulate (Fig. 181); clypeus bluish green metallic, smooth, trapezoid, 1.4 × as wide as high; gena golden; lower frons golden green, with rather strong reticulation but smooth below toruli; antennal scrobes join frontal suture separately; upper frons golden green; vertex golden green.

Mesoscutum golden green to bluish green metallic (Fig. 171). Scutellum bluish green metallic (Fig. 171); 1.1 × as long as wide. Axillae golden green (Fig. 171). Dorsellum bluish green metallic (Fig. 171), convex and smooth (Fig. 179), 0.3 × as long as wide, and 0.5 × as long as length of median propodeum. Propodeum golden green (Fig. 171). Tibiae and tarsi dark brown. Forewing admarginal setae 8-11, arising from marginal vein and from membrane just behind marginal vein; postmarginal vein 1.0 × as long as stigmal vein.

Petiole dark brown. Gaster with first tergite bluish green metallic, remaining tergites dark brown to golden green, 1.0 –1.2× as long as length of mesosoma. Phallobase and aedeagus as in Fig. 488.

Host.

Bayeria capitigena ( Diptera : Cecidomyiidae ) on Euphorbia esula .

Distribution.

Czech Republic, France, Greece, Netherlands, Sweden, United Kingdom, Netherlands (Fig. 513).

Etymology.

Name referring to host plant of host.