Perilampus ruschkai Hellen , 1924

Mitroiu, Mircea-Dan & Koutsoukos, Evangelos, 2023, Perilampus neglectus and other neglected species: new records of Palaearctic Perilampidae (Hymenoptera, Chalcidoidea), with a key to European species of Perilampus, Journal of Hymenoptera Research 96, pp. 57-99 : 57

Perilampus ruschkai Hellen, 1924

Fig. 17

Perilampus ruschkai Hellén, 1924: 13.

Diagnosis.

Head and mesosoma mostly green, with golden or bronze reflections; metasoma black, dark green or bronze green in distal half; female flagellum dark brown, lighter ventrally. Body size: 3-4 mm. Head shape in frontal view (Fig. 17A ) much wider than high. Head in lateral view not unusually long, without distinct sulcus separating posterior eye margin from temple. Clypeal margin (Fig. 17A ) truncate. Supraclypeal area (Fig. 17A ) slightly transverse (less than 1.5 × as wide as high), sides well defined; in males without oval lateral impressions. Malar sulcus versus anterior margin of malar depression shorter. Frontal keels (Fig. 17A ) absent in female, slightly defined in male. Face between scrobes and eye (Fig. 17A ) smooth. Face between clypeus and eye (Fig. 17A ) smooth. Lateral ocellus large (OOL less than twice the largest ocellar diameter). Funicular segments in female: most segments quadrate to transverse. Male scape slightly widened distally, ventral pores on more than half scape length. Mesosoma (Fig. 17B ) not narrow (less than 1.4 × as long as wide). Mesoscutum sculpture (Fig. 17B ) without smooth median tubercle; interspaces smaller than punctures, smooth. Scutellum hind margin (Fig. 17B ) without a double carina, without bilobed protruding projection. Prepectus (Fig. 17C ) wide, dorsal margin longer than pronotal collar; well defined anteriorly (i.e. suture with pronotum very distinct); all sides with punctures, leaving a large smooth central area.

Material examined.

Finland: 1♂, “17093”, “Lojo”, “Forsius”, "coll. Hellen ", "Perilampus Perilampus Hellén ♂, G.J. Kerrich det. 1957", "Pres by Com Inst Ent BM 1958-391" (NHMUK). Sweden : 1♀, "Gotska Sandön, 17/7 1952, K.-J. Hedqvist ", "Perilampus Perilampus Hellén ♀, G.J. Kerrich det. 1960" (NHMUK) .

Hosts.

Associated with Geometridae ( Lepidoptera ); presumably a hyperparasitoid.

Distribution.

Finland, Germany, Hungary, Netherlands, Romania, Russia, Sweden.

Comments.

Very similar to P. nitens (Fig. 13 ), from which it differs in having the frons between eye and scrobes not punctate (Fig. 17A ), the supraclypeal area rather well defined (Fig. 17A ), the male eyes larger (Fig. 17A ), and the head and mesosoma mostly green (Fig. 17 ).

Figures

Figure 13. Perilampus nitens A female, head in frontal view B male, head in frontal view C female, head and mesosoma, dorsal view D female, prepectus.

Figure 17. Perilampus ruschkai A male, head in frontal view B female, head and mesosoma, dorsal view C female, prepectus D female, propodeum.