Perilampus chrysonotus Foerster , 1859

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 chrysonotus Foerster, 1859

Fig. 6

Perilampus chrysonotus Förster, 1859: 120-121.

Perilampus nigellus Nikol’skaya, 1952: 194. Synonymy by Trjapitzin (1978: 54).

Diagnosis.

Head and mesosoma except propodeum dorsally dark green to bronze, with slight golden reflections; or black, with bluish reflections mostly on dorsal side of mesosoma; propodeum and metasoma black; female flagellum dark brown, ventrally reddish-brown. Body size: 1.5-3.0 mm. Head shape in frontal view (Fig. 6A, B ) only slightly wider than high. Head in lateral view not unusually long, without distinct sulcus separating posterior eye margin from temple. Clypeal margin (Fig. 6A, B ) truncate to slightly emarginate. Supraclypeal area (Fig. 6A, B ) higher than wide, sides well defined; in male without oval lateral impressions. Malar sulcus versus anterior margin of malar depression about equal. Frontal keels (Fig. 6A, B ) absent. Face between scrobes and eye (Fig. 6A, B ) smooth. Face between clypeus and eye (Fig. 6A, B ) smooth. Lateral ocellus small (OOL at least twice the largest ocellar diameter). Funicular segments in female: most segments quadrate to transverse. Male scape (Fig. 6B ) slightly widened distally; ventral pores on less than half scape length. Mesosoma (Fig. 6C ) not narrow (less than 1.4 × as long as wide). Mesoscutum sculpture (Fig. 6C ) without smooth median tubercle; interspaces as large as or larger than punctures, smooth. Scutellum hind margin (Fig. 6C ) without a double carina, without any protruding projection. Prepectus (Fig. 6D ) narrow, dorsal margin about as long as pronotal collar; well defined anteriorly (i.e. suture with pronotum very distinct); all sides with punctures, leaving just a very small smooth central area.

Material examined.

Czechia: 1♀, 1♂, " Moravia mer., Mohelno , Bouček lgt. / 6.7.57", "Perilampus chrysonotus Först. ♀ / ♂, Det. Z. Bouček 1957" (NHMUK). Romania : 1♀, " Iași county, Breazu village , near Mârzești forest, steppic vegetation, 05.vii.2011, L. Fusu leg." (MICO) ; 1♂, " Constanța county, Gura Dobrogei Natural Reserve , 12.v.2007, L. Fusu leg." (MICO). Sweden : 1♀, " Sk. Ahus , 8/8 1967, K.-J. Hedqvist ", "Standing over: Perilampus maceki in Hedqvist coll., NHMUK(E) 2011-27" (NHMUK) .

Hosts.

Associated with Lymantriidae ( Lepidoptera ); hyperparasitoid of Ichneumonidae ( Hymenoptera ).

Distribution.

Czechia, France, Germany, Hungary, Mongolia, Netherlands, Russia, Serbia, Slovakia, Sweden, Ukraine. New species to Romania.

Comments.

This is one of the two European species having a high head in both sexes (Fig. 6A, B ). The other species with a similar head is P. intermedius (Fig. 7 ), which greatly differs from P. chrysonotus mainly in having the prepectus poorly defined anteriorly (i.e., appearing virtually fused with pronotum) and very narrow (Fig. 7D ).

Figures

Figure 6. Perilampus chrysonotus A female, head in frontal view B male, head in frontal view C female, head and mesosoma, dorsal view D female, prepectus.

Figure 7. Perilampus intermedius A female, head in frontal view B male, head in frontal view C female, head and mesosoma, dorsal view D male, prepectus.