Pristaulacus vietnamensis Turrisi & Smith 2011
The treatment revisits Pristaulacus vietnamensis, whose holotype is from Viet Nam, and documents female specimens from Loei, Lampang and Chaiyaphum in Thailand. Diagnostic traits include a 9-10 mm mostly black body, a dark forewing spot, a very long petiole, an ovipositor 1.3 times forewing length and a four-toothed tarsal claw. The material broadens its cross-border distribution, while the host remains unknown.