♂, Thua Thien Hue, Vietnam. (photo by K.Saito)		♂, Ha Giang, Vietnam. (photo by K.Saito)
♂, Sekong, Laos.		♀, Sekong, Laos.

ON : Ragadia latifasciata crystallina Monastyrskii & Vu, 2021 OD : Zootaxa 5048(4):500-502, figs.10A(HT,♂), 10B(HT,♂Un), 10C(PT,♀), 10D(PT,♀Un), 9B(♂genitalia). TL : Bach Ma, Thua Thien Hue, Central Vietnam. Distribution : S.Laos, N. & C.Vietnam.

Holotype ♂, Jul.2010. Bach Ma, Thua Thien Hue, Central Vietnam. A.L.Monastyrskii leg.
Paratypes : 4♂ 2♀, Lo Xo pass, Ngoc Linh, Kon Tum ; Kon Chu Rang, Kon Tum, C.Vietnam.

[ LAOS ]
Ragadia critias ssp. ; Inayoshi,2019 : Butterflies in Indo-China, figs.1♂ 1♀. (Sekong) (31.Aug.2019 last updated ; 31.Mar.2025 changed.)
Ragadia crystallina ; Nakamura & Lang, 2023 : 245, figs.7H-Up(♂),7H-Un(♂Un),7H-g1(♂genitalia). (Dak Chueng, Sekong)

[ VIETNAM ]
Ragadia critias ; Monastyrskii,2005 : 101, pl.27, figs.2a♂,2b♂(Un),2c♀,2d♀(Un). (C: Huong Son; Vu Quang; Ngoc Linh; Kon Cha Rang)
Ragadia critias ; Monastyrskii & Devyatkin,2015 : 25. (C)
Ragadia critias ssp. ; Inayoshi,2019 : Butterflies in Indo-China. (by literature) (31.Aug.2019 last updated ; 31.Mar.2025 changed.)
Ragadia latifasciata crystallina ; Monastyrskii & Vu, 2021 : 500-502, figs.10A(HT,♂),10B(HT,♂Un),10C(PT,♀),10D(PT,♀Un),9B(♂genitalia). (C: Ha Tinh; Thua Thien Hue; Quang Nam; Kon Tum; Gia Lai)
Ragadia crystallina ; Nakamura & Lang, 2023 : 245, figs.7F-Up(♂),7F-Un(♂Un),7F-g1(♂genitalia),7G-Up(♀),7G-Un(♀Un). (C: Thua Thien Hue; Kon Tum)

[ LAOS ]
Sekong : 2♂ 1♀, (2♂ genitalia dissected).

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[ VIETNAM ]
Ha Giang : 1♂.

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Thua Thien Hue : 1♂.

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Da Nang : 3♂.

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Monastyrskii & Vu (2021) described crystallina as a subspecies of latifasciata. Subsequently, Nakamura & Lang (2023) elevated both to specific rank. We examined a male specimen from Ha Giang, N. Vietnam. If this data is correct, it would support Nakamura & Lang's view that the two are separate species, as their distribution overlaps with that of latifasciata in this area. On the other hand, the relationship between crystallina and critias requires further study, including molecular analysis.

Monastyrskii, A.L. & Vu, V.L.,2021 : New taxa and new records of butterflies from Vietnam (Lepidoptera, Papilionoidea).
Zootaxa 5048(4):486–510.

Nakamura, N. & Lang, S.Y.,2023 : Re-examination of the genus Ragadia Westwood, [1851] from continental Asia focused on the Indochinese fauna, including descriptions of four new taxa (Lepidoptera, Nymphalidae, Satyrinae).
Neue ent. Nachr. 82:235-262.

2025.03.31.