Omphale brevis Graham

Hansson, Christer & Shevtsova, Ekaterina, 2012, Revision of the European species of Omphale Haliday (Hymenoptera, Chalcidoidea, Eulophidae), ZooKeys 232, pp. 1-157 : 43-46

Omphale brevis Graham Figures 138-153486511

Omphale brevis Graham, 1963: 257. Holotype female in OUMNH, examined.

Material.

Type material.Holotype female, type no. 1296 in OUMNH. Additional material. 24♀ 8♂: Germany 4♀ 2♂ (RMNH), Netherlands 9♀ 4♂ (RMNH), Romania 1♀ (CH), Sweden 8♀ 2♂ (BMNH, CH, NHRS), United Kingdom 2♀ (BMNH).

Diagnosis.

Female gaster short ovate, 1.0 –1.4× as long as mesosoma (Fig. 139); forewing with 8-10 admarginal setae and postmarginal vein 1.4 –1.5× as long as stigmal vein (Fig. 144); legs and petiole yellowish brown (Fig. 138), femora frequently dark brown; male flagellomeres 1-4 with basal setae in a whorl (Fig. 151). Similar to Omphale phruron but with coxae completely pale and shorter gaster in female. Male genitalia: phallobase (Fig. 486) with volsellar setae on short extensions and with apex of setae 0.4 × the length of setae from apex of phallobase, digitus 0.8 × as long as wide; aedeagus short and stout (Fig. 486), with penis valves 1.3 × as long as wide.

Description.

Female. Length of body 0.9-1.4 mm. Antenna with scape yellowish brown with apical ⅓ dark brown, pedicel and flagellum dark brown; pedicel + flagellum 2.0 × as long as distance between eyes; first flagellomere 1.1 × as long and 1.3 × as wide as second flagellomere (Fig. 147); flagellomeres 2-4 ventrally with one set of setae attached close to base of each flagellomere and reaching beyond apex of flagellomere attached to; clava 2-segmented. Face golden purple (Fig. 140), with weak striae (Fig. 148); clypeus golden purple, smooth, rectangular to trapezoid, 1.6 × as wide as high; gena dark brown with golden purple tinges; lower frons golden purple, with weak reticulation; antennal scrobes join on frontal suture; frontal suture V-shaped; upper frons golden purple, with weak reticulation; vertex golden purple, with engraved weak reticulation (Fig. 149). Occipital margin rounded (Fig. 149).

Mesoscutum with midlobe golden purplish and sidelobes golden green (Fig. 141), with engraved reticulation (Fig. 146), midlobe with one pair of setae (posterior pair); notauli as indistinct impressions in posterior ½. Scutellum golden purplish with posterior margin golden green (Fig. 141), with engraved reticulation (Fig. 146); 1.1 × as long as wide; with anteromedian margin almost straight. Axillae golden purple (Fig. 141). Dorsellum golden purple (Fig. 141), slightly concave with very weak reticulation (Fig. 146), 0.4 × as long as wide, and 0.6 × as long as length of median propodeum. Entire lateral mesosoma golden purple (Fig. 138); transepimeral sulcus curved forwards. Propodeum golden green with median part golden purple (Fig. 141), smooth (Fig. 146); propodeal callus with two setae. Legs yellowish brown (Fig. 138), in holotype e ntirely so, but non-types frequently with femora pale brown to dark brown; midleg with first tarsomere 0.4 × as long as length of tarsus. Forewing transparent, veins yellowish brown, setae dark brown (Fig. 144); speculum closed; admarginal setae 8-10, arising from membrane just behind marginal vein (holotype), or from ventral part of marginal vein and from membrane just behind marginal vein (in additional material); radial cell bare; postmarginal vein 1.4 × as long as stigmal vein, stigmal vein slender. Hind wing transparent, apex pointed (Fig. 144). Forewing WIP (Fig. 145) with apical ½ magenta with narrow blue borders, basal ½ with wide bands in yellow, magenta and blue.

Petiole yellowish brown. Gaster dark brown with golden green and blue metallic tinges, ovate and 1.0 –1.4× as long as length of mesosoma; 7th tergite 0.03 × as long as length of gaster.

Male. Length of body 1.0-1.3 mm. Antenna with scape yellowish brown in basal ½, dark brown metallic in apical ½; pedicel + flagellum 2.6 × as long as distance between eyes; flagellomeres 1-4 with verticillate setae and with setae about as long as flagellomere attached to (Fig. 151), with or without a few scattered setae apical to basal whorl; clava 1-segmented. Face bluish purple metallic (Fig. 142), strigose (Fig. 152); clypeus bluish purple metallic, smooth, trapezoid to semicircular, 1.6 × as wide as high; gena dark brown metallic; lower frons bluish green metalic, with engraved weak reticulation, partly smooth; antennal scrobes join frontal suture separately; upper frons with very weak reticulation.

Mesoscutum with midlobe golden purplish and sidelobes green metallic (Fig. 143). Scutellum golden purple with posterior margin green metallic (Fig. 143). Dorsellum convex with weak sculpture (Fig. 150), 0.5 × as long as wide, and 0.4 × as long as length of median propodeum. Entire lateral mesosoma dark brown metallic. Propodeum golden green with median part purplish (Fig. 143). Legs with coxae yellowish brown with base infuscate, femora pale brown to dark brown; tibiae yellowish brown; tarsi yellowish brown with apical tarsomere dark brown. Forewing with admarginal setae 7-9, arising from marginal vein and from membrane just behind marginal vein; postmarginal vein 1.5 × as long as stigmal vein.

Petiole dark brown. Gaster dark brown metallic, 1.1 × as long as length of mesosoma. Phallobase and aedeagus as in Fig. 486.

Hosts.

Cystiphora taraxaci ( Diptera : Cecidomyiidae ) ( Gijswijt 1976), Cystiphora sonchi on Sonchus palustris ( Vidal 1993); Cystiphora sanguinea on Hieracium sabaudum ( Askew 2003).

Distribution.

Germany ( Gijswijt 1976), Netherlands ( Gijswijt 1976), Romania (new record), Sweden ( Hedqvist 2003), United Kingdom ( Graham 1963) (Fig. 511).