Javra opaca (Thomson, 1873)

Verheyde, Fons, Hoekstra, Paul, Libert, Pierre-Nicolas, Meijer, Hilco, Ketelaere, Augustijn De, Vandaudenard, Thibaud, Belgers, Dick & Brosens, Edwin, 1880, Two hundred and five ichneumonid wasps reported for the first time in Belgium and the Netherlands (Hymenoptera: Ichneumonidae), Belgian Journal of Entomology 122, pp. 1-142 : 51

Javra opaca (Thomson, 1873) (Fig. 20)

Javra spp. have a rather long ovipositor. Their basal flagellomeres are very long with the second segment 3.3–5.5× as long as wide. Their sternaulus is also long and reaches the hind edge of the mesopleuron. Their areolet is wide, rectangular or pentagonal. The second tergite is matt, its hairs dense or moderately sparse ( TOWNES, 1970a; JONAITIS, 1981).

Javra opaca has a rather small closed areolet. The notauli are only feebly impressed ( JONAITIS, 1981). Several female specimens were caught, so we can provide more details on the basis of these findings. The head and mesosoma are predominantly black. The antennae are tricoloured, with the basal flagellomeres orange, a white band, and the apical flagellomeres black. The tegulae, hind coxae (apically) and apical tergites (7–8) are white or marked with white. The legs are predominantly orange, but the hind femora and the tibiae are slightly infuscate basally and/or apically. The metasoma is predominantly black, but tergites 1–3 have a broad orange band dorsally and laterally, covering at least half of the tergite (Fig. 20). Plausible hosts in the Netherlands are unknown. First report for the Netherlands; unreported in Belgium.

MATERIAL EXAMINED:

THE NETHERLANDS: • 2 ♀♀; Zundert , De Moeren (NB); 51°29’5”N 4°36’39”E; 5/v/2014; E. Brosens leg.; coll. EB; field observation; M. Schwarz det. • 5 ♀♀; Achtmaal , Oude Buisse Heide (NB); 51°28’5”N 4°34’5”E; 26/vi/2015; E. Brosens leg.; coll. EB; field observation; M. Schwarz det. ; Fig. 20.