Based on the collaborative research on insect biodiversity between the Vietnam National Museum of Natura, the Vietnam Academy of Science and Technology and the Natural History Museum of the University of Florence from 2010 to 2017, scientists have revealed the presence of 24 species. Among them, 9 species are new for science and are described and illustrated. They are Anacinaces lieni sp. n.; Cerdistus setaelongus sp. n.; Clephydroneura serrula sp. n.; Heligmonevra bambii sp. n.; Neoitamus laocaiensis sp. n.;Molobratia hoabinhensis sp. n.; Andrenosoma orbachi sp. n.; Choerades xuansonensis sp. n.; Merodontina vietnamensis sp. n. In additional, 7 species are new record for Vietnam: Astochia lancealata Scarbrough & Biglow, 2004, Hoplopheromerus guangdongi Tomasovic, 2006, Pogonosoma cyanogaster Bezzi, 1917, Lagynogaster suensoni Frey, 1937, Laloides tigris Tomasovic & Grootaert, 2003, Microstylum oberthurii Wulp, 1896, và Microstylum vulcan Bromley, 1928.
Nine new species to science as following:
1. Anacinaces lieni sp. n. (Figure 1-3)
Material: Holotype male, N Vietnam, Vinh Phuc Province, Tam Dao National Park, 950 m, 5-12.VI.2010. Paratypes: 1 female, N Vietnam, Ha Noi Province, Ba Vi National Park, 800 m, 21-24.VI.2012; 1 male, N Vietnam, Sa Pa, Lao Cai (Ta Van), 4.X.2004; 1 female, N Vietnam, Tam Dao National Park, 21°31' N 105°33' E, 25-30.VII.2011.
Description. Male: Body length 22 mm. Body black with grey markings. Wings dark brown. Abdominal tergites with white, long and dense hair.
Fig. 1. Anacinaces lieni sp. n., holotypus, lateral view, total length = 22 mm. Photo by S. Bambi.
Fig. 2. Anacinaces lieni sp. n., holotypus, dorsal view, total length = 22 mm. Photo by S. Bambi.
Fig. 3. Anacinaces lieni sp. n., holotypus, male genitalia: D = dististylus; E = epandrium; G = gonocoxite; P = phallus; scale bar = 1 mm.
2. Cerdistus setaelongus sp. n. (Fig. 4-6)
Material: Holotype male, N Vietnam, Phu Tho Province, Xuan Son National Park, 500 m, 13-17.VI.2010. Paratypes: 2 males, 2 females, N Vietnam, Hao Binh Province, Pa Co Hang Kia Nature Reserve, 700-900 m, 5-7.VI.2013.
Description. Male: Body length 19 mm. Body black with grey-yellowish tomentum. Legs black. Wings brownish. Abdomen with yellow setae.
Fig. 4. Cerdistus setaelongus sp. n., holotypus, lateral view, total length = 19 mm. Photo by S. Bambi. 
Fig. 5. Cerdistus setaelongus sp. n., holotypus, dorsal view, total length = 19 mm. Photo by S. Bambi. 
Fig. 6. Cerdistus setaelongus sp. n., holotypus, male genitalia: E = epandrium; G = gonocoxite; P =
3. Clephydroneura serrula sp. n. (Fig. 7-9)
Material: Holotype male, C Vietnam, Tua Thien Hue Province, Bach Ma National Park, surroundings Hotel Morin, 1350-1400 m, 16°2' N 107°85' E, 23-28.V.2014, at light.
Description. Male: Body length 19 mm. Body yellowish with grey-yellowish tomentum. Legs yellow, not swollen. Wings transparent, hyaline, pale brown with the distal third dull.
Fig. 7. Clephydroneura serrula sp. n., holotypus, lateral view, total length = 19 mm. Photo by S. Bambi.
Fig. 8. Clephydroneura serrula sp. n., holotypus, dorsal view, total length = 19 mm. Photo by S. Bambi. 
Fig. 9. Clephydroneura serrula sp. n., holotypus, male genitalia: E = epandrium; G = gonocoxite; P = phallus; scale bar = 1 mm.
4. Heligmonevra bambii sp. n. (Fig. 10-12)
Material: Holotype male, N Vietnam, Hoa Binh Province, Pa Co Hang Kia Nature Reserve, 900 m, 5-7.VI.2013. Paratypes: 1 male, 1 female, N Vietnam, Vinh Pluc Province, Tam Dao National Park, 950 m, 5- 12.VI.2010; 1 male, N Vietnam, Cao Bang Province, Mt. Pia Oac, 1600-2000 m, 14-16.VI.2012.
Description: Male: Body length 24 mm, wings 16 mm. Body black with grey-yellowish tomentum. Legs yellow. Wings brownish with distal third dull. Epandrium with deep excavation.
Fig. 10. Heligmonevra bambii sp. n., holotypus, lateral view, total length = 24 mm. Photo by S. Bambi.
Fig. 11. Heligmonevra bambii sp. n., holotypus, dorsal view, total length = 24 mm. Photo by S. Bambi. 
Fig. 12. Heligmonevra bambii sp. n., holotypus, male genitalia: E = epandrium; G = gonocoxite; P = phallus; scale bar = 1 mm.
5. Neoitamus laocaiensis sp. n. (Fig.13-15)
Material: Holotype, 1 male, N Vietnam, Lao Cai Province, Van Ban District, Van Ban Nature Reserve, 1000 m, 23-26.V.201.
Description: Male, body length 14 mm, wings 8 mm. Black, small, thin species. Wings brownish. Legs with black femora and yellow tibiae. Head: Face narrow with
Fig. 13. Neoitamus laocaiensis sp. n., holotypus, lateral view, total length = 14 mm. Photo by S. Bambi.
Fig. 14. Neoitamus laocaiensis sp. n., holotypus, dorsal view, total length = 14 mm. Photo by S. Bambi.
Fig. 15. Neoitamus laocaiensis sp. n., holotypus, male genitalia: E = epandrium; G = gonocoxite; GL = gonocoxite, lateral; P = phallus; scale bar = 0.5 mm.
6. Molobratia hoabinhensis sp. n. (Fig. 16-17)
Material: Holotype female, N Vietnam, Hoa Binh Province, Pa Co Hang Kia Nature Reserve, 900-1200 m, 9-12.VI.2013.
Description: Female, body length 17 mm. Antennae, pleura and femora yellow, abdomen yellow and black, wings brown.
Fig. 16. Molobratia hoabinhensis sp. n., holotypus, lateral view, total length = 17 mm. Photo by S. Bambi.
Fig. 17. Molobratia hoabinhensis sp. n., holotypus, dorsal view, total length = 17 mm. Photo by S. Bambi.
7. Andrenosoma orbachi sp. n. (Fig. 18-20)
Material: Holotype male, S Vietnam, Lam Dong Province, Cat Tien District, Nam Cat Tien National Park, Headquarter area, 1200 m, 11-15.VII.2015.
Description: Male, body length 8 mm. Small black species. Antennae black with yellow pedicel, thorax with greyish tomentum and short white hairs, legs yellowish with black tarsi, wings slightly infuscate with black veins.
Fig. 18. Andrenosoma orbachi sp. n., holotypus, lateral view, total length = 8 mm. Photo by S. Bambi.
Fig. 19. Andrenosoma orbachi sp. n., holotypus, dorsal view, total length = 8 mm. Photo by S. Bambi.
Fig. 20. Andrenosoma orbachi sp. n., holotypus, male genitalia: G = gonocoxite; P = phallus; scale bar = 1 mm.
8. Choerades xuansonensis sp. n. (Fig. 21-23)
Material: Holotype male, N Vietnam, Phu Tho Province, Xuan Son National Park, 500 m, 13-17.VI.2010. Paratypes: 1 female, same data of the holotype (MZUF coll. n. 99); 1 male, Cao Bang Province, Mt. Pia Oac, 1600-2000 m, 14-16.VI.2012.
Description: Male, ody length 22 mm. Body black, wings dark brown. Legs black with long hairs. Abdomen punctuated, shining black. Sternites with long, thin, white hairs.
Fig. 21. Choerades xuansonensis sp. n., holotypus, lateral view, total length = 22 mm. Photo by S. Bambi.
Fig. 22. Choerades xuansonensis sp. n., holotypus, dorsal view, total length = 22 mm. Photo by S. Bambi.
Fig. 23. Choerades xuansonensis sp. n., holotypus, male genitalia: G = gonocoxite; P = phallus; scale bar = 1 mm.
9. Merodontina vietnamensis sp. n. (Fig. 24-26)
Material: Holotype male, N Vietnam, Phu Tho Province, Xuan Son National Park, 500 m, 13-17.VI.2010.
Description: Male, body length 18 mm, wings 15 mm. Body black, wings brownish. Legs yellow, tarsi black. Abdomen black. Sternites with long, thin, white hair.
Fig. 24. Merodontina vietnamensis sp. n., holotypus, lateral view, total length = 18 mm. Photo by S. Bambi.
Fig. 25. Merodontina vietnamensis sp. n., holotypus, dorsal view, total length = 18 mm. Photo by S. Bambi.
Fig. 26. Merodontina vietnamensis sp. n., holotypus, male genitalia: E = epandrium; G = gonocoxite; P = phallus; scale bar = 1 mm.
News: Vu Van Lien
Vietnam National Museum of Nature, VAST
Cited article: Tomascovic G. & Bartolozzi L. 2018. Contribution to the knowledge of the robber flies from Vietnam, with description of nine new species (Diptera: Asilidae). Onychium, 14: 173-202 Published 20 April 2018 ISSN: 1224-2669.
http://dx.doi.org/10.5281/zenodo.1219135