Trachyusa

Yao, Junli, Kula, Robert R. & Chen, Jiahua, 2015, A new species in the newly recorded genus Trachyusa (Hymenoptera: Braconidae: Alysiinae) from China, Zootaxa 3931 (4), pp. 579-584 : 580-581

Key to species of the genus Trachyusa

1. Body slender; mesoscutum slender,>1.00X longer than wide; antenna longer than body length........................ 2

- Body stout; mesoscutum comparatively robust, <1.00X longer than wide; antenna as long as or shorter than body length.... 5

2. Head transverse, 1.70–2.20X wider than long medially........................................................ 3

- Head cubic, 1.50–1.60X wider than long medially...................................... Trachyusa aurora (Haliday)

3. Mesoscutum with short midpit ( Belokobylskij 1998: plate 109, fig. 5); sternaulus long, wide, conspicuously extending to poste- rior edge of mesopleuron; 1m-cu slightly postfurcal ( Belokobylskij 1998: plate 109, fig. 4)... Trachyusa indrik Belokobylskij

- Mesoscutum with long midpit ( Fig. 7 ); sternaulus short, becoming inceasingly inconspicuous toward posterior edge of mesopleuron ( Fig. 6 ); 1m-cu slightly antefurcal ( Fig. 1 )....................................................... 4

4. Notauli wide anteriorly and narrow posteriorly, sculptured ( Belokobylskij 1998: plate 109, fig. 6); metacoxae more or less sculp- tured; mesosoma and metasoma black or dark reddish brown; first flagellomere 3.50–4.30X longer than apical width; head

width 1.70–1.90X longer than medial length; ( Belokobylskij 1998: plate 109, fig. 7)....... Trachyusa vasilisk Belokobylskij - Notauli wide and with deep sculpture ( Fig. 4 ); metacoxae smooth ( Fig. 10 ); mesosoma and metasoma yellow ( Fig. 1 ); first flagellomere 4.50–5.75X longer than apical width; head width 1.67–2.25X longer than medial length ( Fig. 4 )......................................................................................... Trachyusa whartoni Yao , sp. n. 5. Notauli on posterior half of mesoscutal disc deeply impressed ( Papp 1967: fig. 2); mesoscutum black; first metasomal tergum usually more slender ( Papp 1967: fig. 3).............................................. Trachyusa szepligetii Papp

- Notauli on posterior half of mesoscutal disc at most shallowly impressed ( Papp 1967: fig. 8); mesoscutum brownish yellow; first tergum rather robust ( Papp 1967: fig. 9)........................................... Trachyusa bucephala Papp

Figures

FIGURES 7 – 10. Trachyusa whartoni Yao, sp. nov. 7. Mesosoma, dorsal view. 8. Metasoma, dorsal view. 9. Metasoma, lateral view. 10. Meso- and metathoracic legs, lateral view.

FIGURES 1 – 6. Trachyusa whartoni Ya o, sp. nov. 1. Lateral habitus. 2. Head and antennae, lateral view. 3. Head, anterior view. 4. Head and mesoscutum, dorsal view. 5. Head, lateral view. 6. Head and mesosoma, lateral view.