Chalybion japonicum ( Gribodo, 1882 )

Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu & Nguyen, Dinh Thi, 2025, Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species, Zootaxa 5679 (4), pp. 573-584 : 579

Chalybion japonicum ( Gribodo, 1882)

( Figs 12–17 )

Material examined. VIETNAM. Hoa Binh: 2 ♀♀, 2 ♂♂, Yen Thuy, 30.iii.–10.iv.2003 , Malaise trap; 1 ♂, Da Phuc, Yen Thuy, 20–30.iv.2003 , Malaise trap; 1 ♀, Tan Son, Mai Chau, 10–15.iv.2010, Malaise trap; 3 ♀♀, 10 ♂♂, Tan Vinh, Luong Son, 2.v.2017; 2 ♂♂, Dong Bang, Mai Chau, 18.v.2018 , nest. Son La: 2 ♀♀, 2 ♂♂, Chieng Bom, Thuan Chau ( Copia Natural Reserve ), 1010 m, 15.v.2017 ; 1 ♀, 2 ♂♂, Son La city, 10–20.v.2017 ; 2 ♀♀, Son La city, 1–10.viii.2017 , Malaise trap. Phu Tho: 4 ♀♀, 3 ♂♂, Kiet Son, Tan Son, 30.iii.2010 ; 4 ♂♂, Xuan Dai, Tan Son, 15.iii.2010; 2 ♀♀, Tan Son town , 12.iv.2024 , nest; 2 ♀♀, 1 ♂, Thu Cuc, Tan Son, 13.iv.2024, nest. Vinh Phuc: 3 ♀♀, 4 ♂♂, Ngoc Thach, Me Linh, 4.iv.–4.v.2001 , Malaise trap; 12 ♀♀, 9 ♂♂, Me Linh Station for Biodiversity, 1– 3.vi.2018, 12.vi.2021 , insect nets, trap nests; 1 ♀, 3 ♂♂, Tam Dao National Park , Tam Dao, 13.vi.2012 . Ha Tinh: 1 ♂, Ke Go lake , Cam Le, Cam Xuyen, 23.iii.2019 ; 6 ♀♀, 3 ♂♂, Vu Quang National Park , Vu Quang, 24–27.v.2024 . Nghe An: 4 ♀♀, 1 ♂, Pu Mat National Park , Con Cuong, 21–23.v.2024 . Lao Cai: 2 ♀♀, 2 ♂♂, Bat Xat, 21.vi.2023 . Ninh Binh: 2 ♀♀, Gia Sinh, Gia Vien, 24.vi.2017 , insect net; 2 ♀♀, Cuc Phuong National Park , Nho Quan, 29–31.vii.2024 ; 10 ♀♀, 15 ♂♂, Cuc Phuong National Park , 30.iv.2019 (VIE3) ; 4 ♀♀, Cuc Phuong National Park , 29.iv.2019 (VIE1) ; 1 ♀, Cuc Phuong National Park , 09.v.2019 (VIE13) ; 1 ♀, Cuc Phuong National Park , 06.v.2019 . Ha Noi: 8 ♀♀, 12 ♂♂, Ba Vi National Park , Ba Vi, 28.vi.2016, 10.vii.2016, 30.iv.2017, 6–8.viii.2024 ; 5 ♀♀, 2 ♂♂, Dong Mo, Ba Vi, 17.viii.2024, nests; 2 ♀♀, Van Hoa, Ba Vi, 17.xii.2023, nest. Bac Kan: 2 ♀♀, Deo Gio, Ngan Son, 22.v.2022 ; 1 ♂, Sy Binh, Bach Thong, 23.viii.2024 . Ha Giang: 5 ♀♀, Phong Quang, Vi Xuyen, 26.v.2022 ; 2 ♀♀, 2 ♂♂, Phong Quang, Vi Xuyen, 3.vi.2023; 3 ♂♂, Bat Dai Son, Quan Ba, 16–19.vi.2023. Cao Bang: 1 ♀, 1 ♂, Thanh Long, Ha Quang, 12–14.vi.2023 ; 1 ♂, Ngoc Dong, Ha Quang, 23.v.2022; 1 ♀, Phong Phin, Deo Gio, 12.vi.2023. Thai Nguyen: 8 ♀♀, 5 ♂♂, Pho Yen, 30 viii.2022 , trap nests; 1 ♂, Phu Luu, 21.vi.2020. Quang Ninh: 3 ♀♀, 2 ♂♂, Tien Yen town , 22.viii.2023 , insect net, nest.

Distribution. Vietnam: Tonkin (= northern Vietnam); Ha Noi and Ha Giang ( Hensen 1988); Hoa Binh and Son La ( Pham et al. 2019); Bac Kan, Cao Bang, Ha Tinh, Lao Cai, Nghe An, Ninh Binh, Phu Tho, Quang Ninh, Thai Nguyen, Vinh Phuc (new records). Elsewhere: China, Japan, Korea, Laos Philippines, Russian Far East, Thailand, Taiwan ( Pulawski 2024).

Figures

FIGURES 12–17. Antenna and genitalia of male Chalybion japonicum (Gribodo, 1882), ♂♂. 12. Antenna with placoids on flagellomeres 7–9; 13. Genitalia, in ventral view; 14. Genitalia, in dorsal view; 15. Antenna with placoids on flagellomeres 7–9; 16. Genitalia, in ventral view; 17. Genitalia, in dorsal view. Arrows show position of placoids.