ON : Baracus vittatus sugimotoi Nakamura, 2025 OD : Butterflies 96: 32-36. figs.4A(HT,♂), 4B(PT,♀), 6A-G(♂genitalia). TL : Muang Suy, 32km west of Phonsavan, Xieng Khouang, C.Laos. (in coll. N.Nakamura) Distribution : Laos. [N.Vietnam]

Holotype ♂, 21.Jul.2014, Muong Suy, 32km west of Phonsavan, alt. 1100m, Xieng Khouang, C.Laos. N.Nakamura leg. (in coll. N.Nakamura, It will be deposited at RIEB)
Paratype 1♀, 26.Mar.2005, 40km S. of Laksao, near Nam Nian, alt. 540m, Kammouane, E.Laos. S.Sugimoto leg. (in coll. S.Sugimoto)

[ LAOS ]
Baracus vittatus septentrionum ; Sugimoto,2019 : 53, figs.7,♀,♀(Un). (Khammouane: Lak Xao near Nam Nian)
Baracus vittatus septentrionum ; Inayoshi,2019 - 2025 : Butterflies in Indo-China. (by literature) (31.Jan.2025 last updated ; 30.Apr.2025 changed.)

[ VIETNAM ]
Baracus vittatus septentrionum ; Devyatkin & Monastyrskii,1999 : 163. (Son La)
Baracus vittatus septentrionum ; Monastyrskii & Devyatkin,2015 : 76. (N: Son La)
Baracus vittatus septentrionum ; Inayoshi,2017 - 2025 : Butterflies in Indo-China. (by literature) (31.Jan.2025 last updated ; 30.Apr.2025 changed.)

The population from N. Vietnam has been attributed to ssp.septentrionum but is uncertain as it has never been illustrated. It is tentatively included here in this taxon. Further taxonomic study is needed.

Sugimotot, S.,2019 : Notes on some Hesperid butterflies of Southeast Asia
Butterflies 80: 52-54.

Nakamura, N.,2025 : Notes on the butterflies of Laos (XIII): descriptions of four new subspecies.
Butterflies 96: 28-37.

2025.04.30.