Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 92. (Budapest 2000)

Papp, J.: First synopsis of the species of obscurator species-group, genus Bracon, subgenus Glabrobracon (Hymenoptera: Braconidae, Braconinae)

Hosts - Blastophagus minor HARTIG and Myelophilus piniperda LINNAEUS (Col. Scolytidae) (after SHENEFELT 1978: 1607). - Both scolylid beetle hosts are in need of confirmation. Distribution - England, Germany, Czech Republic, *Hungary, Bulgaria. Taxonomic position - Within the subgenus Glabrobracon the species Bracon instabilis stands nearest to B. momphae PAPP considering their receded temple, sculptured second tergite and black corporal colour; the specific distinction between them is presented in the subsequent key: 1 (2) Second submarginal cell short, 4-SR more than twice as long as 3-SR (Fig. 32). First tergite 1.2-1.4 times as long as broad behind, beyond spiracles with parallel to somewhat diverging sides, tergites 2-3 equal in length (Fig. 35). First discal cell long, 1-2CU1 clearly longer than 1-M (Fig. 34, see pair of arrows), junction of m-cu and 1-SR-M pointed (Fig. 34, see right upper horizontal arrow). Ovipositor sheath as long as to somewhat shorter than hind tibia.

ÇcT: 2.2-3.5 mm B. (Gl.) instabilis MARSHALL Figs 29-37. Bracon (Glabrobracon) instabilis MARSHALL: 29 = head of female in dorsal view, 30 = hind femur, 31 = claw of leg, 32 = distal part of left fore wing of female, 33 = pterostigma and second submarginal cell of left fore wing of female, 34 = first discal cell of right fore wing, 35 = tergites 1-3, 36 = temple of male in dorsal view, 37 = pterostigma and second submarginal cell of left fore wing of male