| 1 | | | Epipleurum separated from the 3rd tergum, the crease with black line (Fig. 7D) | | | 2 |
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| – | | | Epipleurum not separated from the 3rd tergum, with lateral black line above the anterior ventrolateral edge or without lateral black line (Figs 7J, 7K) | | | 13 |
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| 2 | | | |
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| – | | | Ovipositor straight and shorter than hind tibia (Fig. 1A) | | | 3 |
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| 3 | | | Antennal flagellum with less than 40 segments. 2nd recurrent vein of fore wing distad of the middle of areolet (Fig. 5D) | | | Dusona maruyamator |
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| – | | | Antennal flagellum with more than 40 segments. 2nd recurrent vein of fore wing basad or opposite the middle of areolet (Figs 5B, 5C) | | | 4 |
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| 4 | | | Areolet of fore wing pentagonal shape, without stalk (Fig. 5M) | | | Dusona bellipes |
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| – | | | Areolet of fore wing quadrate, with or without stalk (Fig. 5R) | | | 5 |
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| 5 | | | Antennal carina very highly raised, with wrinkles (Fig. 8A). Central part of face with weak protuberance (Fig. 4R) | | | Dusona mactatoides |
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| – | | | Antennal carina not raised or low and narrow (Fig. 8B). Face convex generally (Fig. 4F) | | | 6 |
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| 6 | | | Mandible brown to dark brown except basal part black (Fig. 4O) | | | 7 |
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| – | | | Mandible completely or partly yellow (Fig. 4K) | | | 8 |
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| 7 | | | |
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| – | | | Mandible brown (Fig. 4F). Tegula yellow. Nervellus inclivous | | | Dusona rugosa |
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| 8 | | | Petiole in front of glymma smooth (Fig. 1F) | | | 9 |
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| – | | | Petiole in front of glymma at least with fine sculpture or striate (Fig. 8C) | | | 11 |
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| 9 | | | Antennal flagellum with less than 55 segments. Clypeus with rounded apical margin | | | Dusona stragifex |
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| – | | | Antennal flagellum with more than 55 segments. Clypeus with truncate apical margin | | | 10 |
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| 10 | | | Antennal carina distinctly raised, its rim bent upwards (Fig. 8A). Nervellus vertical, intercepted in lower 0.4. 4th tergum at least reddish brown anteriorly (Fig. 2B) | | | Dusona celator |
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| – | | | Antennal carina low and narrow (Fig. 1C). Nervellus reclivous, intercepted in lower 0.25. Metasoma completely black posteriorly from 4th tergum black completely (Fig. 1A) | | | Dusona koreana Choi & Lee, sp. n. |
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| 11 | | | Body length longer than 17 mm. Hind femur reddish brown, sometimes marked brown or black basally (Fig. 3D). Petiole with striate in front of glymma | | | Dusona cultrator |
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| – | | | Body length shorter than 16 mm. Hind femur black (Fig. 3B). Petiole with fine sculpture in front of glymma (Fig. 8C) | | | 12 |
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| 12 | | | Clypeus with truncate apical edge (Fig. 4N). 5th tergum reddish brown completely (Fig. 3B) | | | Dusona bicoloripes |
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| – | | | Clypeus with concave apical edge (Fig. 4T). 5th tergum reddish brown narrowly marked with black dorsally (Fig. 3H) | | | Dusona sasayamae |
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| 13 | | | Epipleurum not separated from the 3rd tergum, without anterior ventrolateral black stripe (Fig. 7K) | | | 14 |
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| – | | | Epipleurum not separated from the 3rd tergum, however with distinct or weak black stripe anterior ventrolateral edge (Fig. 7J) | | | 19 |
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| 14 | | | Antennal carina raised and the rim bent upward or widened (Fig. 8A) | | | 15 |
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| – | | | Antennal carina low and narrow (Fig. 8B) | | | 17 |
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| 15 | | | Clypeus with convex apical edge. Petiole without glymma (Fig. 8D). Nervellus reclivous and not intercepted | | | Dusona auriculator |
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| – | | | Clypeus with truncate or weak concave apical edge. Petiole with distinct or large deep glymma (Fig. 8C). Nervellus inclivous and intercepted | | | 16 |
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| 16 | | | Antennal flagellum with more than 65 segments. Frons with a median longitudinal carina. Mandible dark brown | | | Dusona matsumurae |
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| – | | | Antennal flagellum with fewer than 65 segments. Frons without a median longitudinal carina. Mandible yellow | | | Dusona crassiventris |
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| 17 | | | Clypeus with convex apical edge. Areolet of fore wing small, 2nd recurrent vein distad of its middle. Petiole without glymma (Fig. 5I). Body length shorter than 10 mm | | | Dusona schikotani |
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| – | | | Clypeus with truncate apical edge. Areolet of fore wing large, 2nd recurrent vein basad of its middle. Petiole with glymma (Fig. 5G). Body length longer than 15 mm | | | 18 |
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| 18 | | | Antennal flagellum with more than 65 segments. Frons without median longitudinal carina | | | Dusona falcator |
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| – | | | Antennal flagellum with fewer than 60 segments. Frons with strong or weak a median longitudinal carina | | | Dusona obliterata |
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| 19 | | | Petiole with distinct or weak glymma (Fig. 8C) | | | 20 |
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| – | | | Petiole without glymma (Fig. 8D | | | 21 |
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| 20 | | | Antennal carina low, the rim weakly bent upward. Frons with incomplete median longitudinal carina. Mandible yellow. Nervellus inclivous | | | Dusona glauca |
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| – | | | Antennal carina weakly raised, the rim bent upward. Frons with very high raised median longitudinal carina. Mandible brown to black. Nervellus reclivous | | | Dusona ucrainica |
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| 21 | | | 3rd tergum and 4th tergum black dorsally and widely reddish brown laterally | | | 22 |
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| – | | | 3rd tergum reddish brown, 4th tergum reddish brown or black with reddish brown anteriorly | | | 23 |
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| 22 | | | 2nd recurrent vein of fore wing connected to middle of areolet (Fig. 5J). Nervellus vertical. Tegula yellow | | | Dusona signator |
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| – | | | 2nd recurrent vein of fore wing basad middle of areolet (Fig. 5S). Nervellus inclivous. Tegula blackish brown | | | Dusona scalprata |
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| 23 | | | Antennal carina weakly raised, the rim weak bent upward. Hind femur reddish brown (Fig. 2A). Body length shorter than 10 mm | | | Dusona annexa |
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| – | | | Antennal carina low and narrow or very strongly raised. Hind femur black. Body length longer than 10 mm (except body length of Dusona petiolator 8–10 mm) | | | 24 |
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| 24 | | | Antennal flagellum with more than 56 segments. Antennal carina strongly raised. Clypeus with convex apical edge | | | Dusona okadai |
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| – | | | Antennal flagellum with less than 52 segments. Antennal carina low and narrow. Clypeus with truncate apical edge | | | 25 |
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| 25 | | | Frons with a median longitudinal carina. Nervellus reclivous. Petiole with longitudinal striae in front of glymma | | | Dusona obtutor |
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| – | | | Frons without median longitudinal carina. Nervellus inclivous. Petiole smooth in front of glymma or with weak sculpture | | | 26 |
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| 26 | | | Mandible black. Areolet large with short stalk. 2nd recurrent vein of fore wing basad middle of areolet (Fig. 5Q). 4th tergum reddish brown (Fig. 3E) | | | Dusona japonica |
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| – | | | Mandible yellow. Areolet large without stalk. 2nd recurrent vein of fore wing distad middle of areolet. 4th tergum black or reddish brown anteriorly (Fig. 2E) | | | Dusona petiolator |
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