Genus Testudobracon Quicke, 1986: 25 & 1987: 133.

Type-species: Testudobracon niger Quicke, 1986 (original description).

Checklist and distribution of Testudobracon species in alphabetical order

Testudobracon alius Long, sp. nov. . Oriental: Vietnam

Testudobracon asphondyliae Haider & Shujauddin, 2004 . Oriental: India

Testudobracon athashi Ranjith, 2017 . Oriental: India

Testudobracon australicolorus Quicke & Ingram, 1993 . Australasian: Australia-Queensland

Testudobracon flavus Wang, Chen & He, 2003 . Eastern Palaearctic: China; Oriental: China, Vietnam Testudobracon descensus Long, sp. nov. . Oriental: Vietnam

Testudobracon gibbosa Yang & Chen, 2006 . Oriental: China

Testudobracon grandiventris Wang, Chen & He, 2003 . Oriental: China

Testudobracon guangxinensis Wang, Chen & He, 2003 . Oriental: China

Testudobracon imitator Long, sp. nov. . Oriental: Vietnam

Testudobracon longicaudis Maeto, 1991 . Eastern Palaearctic: Japan

Testudobracon malabaricus Sheeba, 2017 . Oriental: India

Testudobracon niger Quicke, 1986 . Oriental: Indonesia (Java)

Testudobracon phiaoacus Long & PQMai, sp. nov.. Oriental: Vietnam

Testudobracon pleuralis (Ashmead,1906) . Eastern Palaearctic and Oriental: China, Japan

Testudobracon shameeri Ranjith, 2017 . Oriental: India

Testudobracon tatyanae Quicke & Ingram, 1993 . Australasian: Australia-Queensland

Testudobracon travencorensis Sheeba, 2017 . Oriental: India

Testudobracon unicolorus Quicke & Ingram, 1993 . Australasian: Australia; Oriental: China

Testudobracon watanabei Yang & Chen, 2006 . Oriental: China

Key to Testudobracon species (*) from Vietnam

Based on females, the differences between Vietnamese species are keyed below:

1. In dorsal view, postero-lateral protuberance of sixth metasomal tergite hardly visible (Figs 4h, 8g, 9c); vein 3-SR of fore wing 0.8–1.1 × vein 2-SR; pterostigma rather long, 2.2–2.4 × as long as wide medially (Figs 3, 7, 9e)....................... 2

- In dorsal view, postero-lateral protuberance of sixth metasomal tergite distinctly visible (Figs 2g, 6c); vein 3-SR of fore wing 1.4 × vein 2-SR; pterostigma broad 2.7 × as long as wide medially (Figs 2h, 6i).................................... 4

2. In lateral view, third–fifth metasomal tergites with distinctly rounded postero-lateral lobe like protuberances (Fig. 9b); metasomal tergites without blackish spots; antennae yellow. China, Vietnam ...... Testudobracon flavus Wang, Chen & He

- In lateral view, third-fifth metasomal tergites with oblique postero-lateral lobe like protuberances (Figs 4g, 8h); metasomal tergites with blackish spots (Figs 3, 8c); antennae brown...................................................... 3

3. Vein 3-SR of fore wing distinctly shorter (0.8 ×) than vein 2-SR (Fig. 4k); second metasomal tergite distinctly longer third tergite (Fig. 4c); ovipositor abruptly bent (curved) dowwards subapically (Fig. 4i), slightly longer than metasoma in lateral view (Fig. 3), and apico-ventrally without serrations, but subapico-ventrally with serrations before ovipositor incision (Fig. 4i); mesopleuron largely black dorsally (Fig. 4f); mesosternum blackish brown............................................................................................................ Testudobracon descensus Long, sp. nov.

- Vein 3-SR of fore wing slightly longer (1.1 ×) than vein 2-SR (Fig. 8k); second metasomal tergite as long as third tergite (Fig. 8c); ovipositor straight (Fig. 8i), subequal to metasoma in lateral view, and apico-ventrally with serrations (Fig. 7); mesopleuron and mesosternum reddish yellow (Fig. 8f)......................... Testudobracon phiaoacus Long & PQMai, sp. nov.

4. Apex of lateral lobes third-fourth sharp (Fig. 6g); third metasomal tergite 2.8 × wider than long; apical median emagination (incision) of sixth metasomal tergite deep, touching basal sulcus of the tergite (Fig. 6c); ovipositor abruptly bent (curved) dowwards subapically, subapico-ventrally with serrations before ovipositor incision (Fig. 5); prescutellar sulcus with 6 carinae (Fig. 6d).............................................................. Testudobracon imitator Long, sp. nov.

- Apex of lateral lobes third-fourth blunt (Fig. 2c); third metasomal tergite 2.5 × wider than long; apical median emagination (incision) of sixth metasomal tergite not touching basal sulcus of the tergite, 0.6 × as long as tergite medially (Fig. 2g); ovipositor straight, and apico-ventrally with serrations (Fig. 1); prescutellar sulcus with 8–9 carinae (Fig. 2a)..................................................................................... Testudobracon alius Long, sp. nov.

(*) Notes. The previously known Testudobracon species of the world were keyed by Sheeba et al. (2017).