Obisiphaga stenoptera (Marshall, 1868)

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 : 97

Obisiphaga stenoptera (Marshall, 1868)

Obisiphaga stenoptera belongs to the earlier mentioned group of Hemitelina and is easy to identify. It often has brachypterous females. Its mesosoma is predominantly black, its metasoma and its legs are light yellow to orange. The basal flagellomeres are orangish, the apical flagellomeres are black. Its ovipositor is relatively long. In contrast to another Palaearctic species O. albiannulata the teeth of the mandibles are of equal length, its frons is only partly granulate and the first segment of the metasoma is 1.4–1.9× as long as wide ( SCHWARZ, 2018). The species seems to be at least uncommon in the Low Countries. O. stenoptera is known to parasitize several species of pseudoscorpions (AUSTIN et al., 1998) ( Arachnida: Pseudoscorpiones).

First report of the species and the genus for Belgium; confirmed in the Netherlands.

MATERIAL EXAMINED:

BELGIUM: • 1 ♀; Ferrières (LG); 50°23’41”N 5°32’01”E; 12/vii/2018; M. Valdueza leg.; field observation; M. Schwarz det. (ObsID: 166986245) .

THE NETHERLANDS: • 1 ♀; Zeist (UT); 52°05’49”N 5°12’58”E; 18/vii/2016; H. Jansen leg.; field observation; M. Schwarz det. (ObsID: 165484021) .