Delomerista borealis Walkley, 1960

Varga, O., 2018, A Review Of The Tribe Delomeristini (Hymenoptera, Ichneumonidae, Pimplinae) In The Ukrainian Carpathians, Vestnik Zoologii 52 (3), pp. 235-240 : 236

Delomerista borealis Walkley, 1960 * ( fig. 1 , 11)

Material. Ukraine: IF: Mochary , sweeping, 26.05.2014, 1 ♀ (Varga) ( ZISK) .

Diagnosis. This species is characterized by the irregularly granulate metasoma (as on fig. 1 , 5); the two basal antennal segments with numerous rows of sensillae ( fig. 1 , 11); the malar space which is about 0.5 × length of basal width of mandible; the black face and upper hind corner of pronotum; the brownish tegulae; the ovipositor which is about 1.8 × length of hind tibia, with simply tapered at apex upper valve ( fig. 1 , 7). Male is distinguisheble by the entirely yellow face and clypeus, the narrow and black malar space (as on fig. 1 , 2 ), the black tegulae and alongate area superomedia.

Remarks. Delomerista species look rather like Scambus (Ephialtini) , but have simple fore tarsal claws (without basal lobe); propodeum with a more-or-less well defined area superomedia; more finely sculptured, matt metasoma; yellow malar space and mandibles (at least basally).

Flight period in Carpathians. May.

Figures

Fig.1.Delomerista spp.1–2 —habitus,lateralview:1—D.cf.japonica, female;2 — D.novita,male;3 —D. novita, female, dorsal view of propodeum; 4, 5 — dorsal view of the second metasomal tergite: 4 — D. pfankuchi, male; 5 — D. novita, female; 6–10 — lateral view of ovipositor tip: 6 — D. pfankuchi; 7 — D. borealis; 8 — D. mandibularis; 9 — D.cf. japonica; 10 — D.japonica (non-Carpathian material); 11–12 — lateral view of two basal antennal segments: 11 — D. borealis; 12 — D. mandibularis.

Fig. 2. Perithous spp.: 1 — P. speculator, female, habitus, lateral view; 2 — P. scurra, female, dorsal view of the second metasomal tergite; 3–4 — dorsal view of propodeum and metasomal tergites I–II, female: 3 — P. divinator; 4 — P. septemcinctorius; 5 — P. scurra, male, habitus, lateral view.