Delomerista cf. japonica Cushman, 1937

Varga, O., 2018, A Review Of The Tribe Delomeristini (Hymenoptera, Ichneumonidae, Pimplinae) In The Ukrainian Carpathians, Vestnik Zoologii 52 (3), pp. 235-240 : 236-237

Delomerista cf. japonica Cushman, 1937 ( figs 1, 1 , 9, 10)

M a t e r i a l. Ukraine: IF: Dibrova , sweeping, 2.06.2013, 1 ♀, 6.06.2013, 1 ♀, 12.06.2013, 1 ♀ (Varga) ( ZISK) .

Diagnosis. This species is characterized by the irregularly granulate metasoma (as on fig. 1 , 5); the malar space which is about 0.5 × length of basal width of mandible; the yellow upper hind corner of pronotum and tegulae; the short and sloping down propodeum with area superomedia wider than long; the ovipositor which is about 1.4–1.6 × length of hind tibia, with rounded at apex upper valve ( fig. 1 , 9). Male is distinguisheble by the yellow malar space and tegulae and the small and broadly triangular area superomedia.

Flight period in Carpathians. June.

Remarks. This species is close to non-Carpathian examined D. japonica specimens and to D. mandibularis (Gravenhorst, 1829) , but differs by the smaller body compared to most other Delomerista species, the antenna with only 20–21 segments (23 in D. japonica and 27–29 in D. mandibularis ); the wider area superomedia which is about 1.2–1.3 × as wide as long (1.0– 1.1 in D. japonica and 0.7–0.8 in D. mandibularis ); the ovipositor which is about 1.4–1.5 × the length of the hind tibia (1.1–1.2 in D. japonica and 1.8–2.2 in D. mandibularis . Additionally, D. cf. japonica has two basal antennal segments with numerous rows of sensillae (as on fig. 1 , 11) (less abundant in D. mandibularis ( fig. 1 , 12 )).

Thus, we discussed these Carpathian specimens with Gavin Broad and after examination he stated to leave these species with a queston mark.

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.