This paper contains descriptions and illustrations of five new species of the genus Aulacocentrum Brues, 1922, from Vietnam, viz. Aulacocentrumassitum Long & Pham, sp. nov.; A.glabrum Long, sp. nov.; A.imparum Long & van Achterberg, sp. nov.; A.intermedium Long & van Achterberg, sp. nov.; and A.simulatum Long, sp. nov. Additionally, Aulacocentrumseticella van Achterberg & He is newly recorded for Vietnam's braconid fauna. A checklist and a key to the Oriental and East Palaearctic Aulacocentrum species is provided and the in-country distribution of the Vietnamese species is given.
Keywords: Australasian; Eastern Palaearctic; Ichneumonoidea; Oriental; new record; new species; parasitoid.
Thi Nhi Pham, Khuat Dang Long, Cornelis van Achterberg, Thi Quynh Nga Cao, Van Phu Pham, Thi Hoa Dang.