♂, Nan, Thailand.		♀, Nan, Thailand.
♂, Nan, Thailand.		♂, Bolikhamxai, Laos.

ON : Ragadia critias Riley & Godfrey, 1921 OD : J. nat. Hist. Soc. Siam 4(3):171-173, pl.4, fig.4,♂. TL : "Nam Pat, 36 miles E. of Utaradit, N.E.Siam" [Nam Pat, Utaradit, NE.Thailand]. (NHML) Distribution : S.Yunnan, NE.Thailand, N. & C.Laos.

Syntypes 1♂, Rh115, Nam Pat, Utaradit, N.E.Siam. 1920.Jan. (NHML, examined) ; 1♀, Rh116, Nam Pat, Utaradit, N.E.Siam. 1920.Jan. (NHML, examined)

[ THAILAND ]
Ragadia critias ; Godfrey,1930 : 253. (Utaradit: Nam Pat)
Ragadia critias ; Pinratana,1988 : 29. (not fig. list only)
Ragadia critias ; Ek-Amnuay,[2007] : 292, pl.118, figs.S88,♂,♂(Un). (Doi Phu Kha)
Ragadia critias ; Nishimura,2008 : 114, figs.16,♂,17,♂(Un). (Nan: Doi Phu Kha)
Ragadia critias ; Ek-Amnuay,2012 : 292, pl.118, figs.N123,♂,♂(Un). (Doi Phu Kha)
Ragadia critias ; Kimura et al.,2016 : 192, figs.♂,♂(Un). (Nan Prov.)
Ragadia critias ; Inayoshi,1998-2019 : Butterflies in Indo-China, figs.2♂ 1♀. (Nan) (31.Jul.2019 last updated ; 31.Aug.2019 changed.)
Ragadia critias ; Nakamura & Lang, 2023 : 245, figs.7I-Up(♂),7I-Un(♂Un),7I-g1(♂genitalia). (Nan: Doi Phu Kha)
Ragadia critias critias ; Inayoshi,2019-2024 : Butterflies in Indo-China, figs.2♂ 1♀. (Nan) (31.May.2024 last updated ; 31.Mar.2025 changed.)
Ragadia critias critias ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2024- : Butterflies of Thailand, fig. (Nan) (accessed: 2024.05.06)

[ LAOS ]
Ragadia critias ; Osada, Uémura & Uehara,1999 : 211, pl.96, figs.♂,♀(Un). (Oudomxay; Nam Dhua)
Ragadia critias ; Uémura,2004 : 5, fig.30,map. (Oudomxay)
Ragadia critias ; Nimura & Wakahara,2005 : 44. (Namdhua; Thabeng)
Ragadia critias ; Uémura,2006 : 7, fig.37,map. (Phong Si; Vieng Thong)
Ragadia critias ; Uémura,2007 : 3, fig.20,map. (C: Ban Lat Khoay; Muang Kham; near border to Vietnam)
Ragadia critias ; Nakamura & Wakahara,2012 : 49.
Ragadia critias ; Inayoshi,1998-2019 : Butterflies in Indo-China. (by literature) (31.Jul.2019 last updated ; 31.Aug.2019 changed.)
Ragadia latifasciata critias ; Onodera,2022 : 235, pl.185, figs.♂,♂(Un),♀,♀(Un). (Oudomxai ; Luang Phabang)
Ragadia critias ; Nakamura & Lang, 2023 : 245, figs.7J-Up(♂),7J-Un(♂Un),7J-g1(♂genitalia),7K-Up(♂),7K-Un(♂Un),7K-g1(♂genitalia),7L-Up(♂),7L-Un(♂Un),7L-g1(♂genitalia),7M-Up(♂),7M-Un(♂Un),7M-g1(♂genitalia),7N-Up(♀),7N-Un(♀Un),7O-Up(♀),7O-Un(♀Un),7P-Up(♀),7P-Un(♀Un). (N: Phongsali; Oudomxai / C: Luang Phrabang; Vientiane; Bolikhamxai / S: Champasak)
Ragadia critias critias ; Inayoshi,2019-2024 : Butterflies in Indo-China, fig.1♂. (Bolikhamxai) (31.May.2024 last updated ; 31.Mar.2025 changed.)

[ THAILAND ]
Nan (Pua dist ; Song Khwae dist.) : 10♂ 2♀ (incl. photo and photo by A.Giudici), (2♂ genitalia dissected).

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[ LAOS ]
Luang Phabang : 1♀ (photo by H.Onodera).

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Oudomxai : 2♂ (photo by H.Onodera).

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Xieng Khouang : 1♂ (photo by H.Onodera).

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Bolikhamxai : 6♂ (incl. photo by H.Onodera).

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This is a very localised species in Thailand. The butterfly is locally common in dense montane forests at low to high elevations (Alt. 440m - 1700m). Males are territorial on undergrowth.
Monastyrskii & Vu (2021) treated critias and crystallina as subspecies of latifasciata. Subsequently, Nakamura & Lang (2023) elevated both to specific rank. Here I provisionally follow Nakamura & Lang, but the relationship between critias and crystallina requires further study, including molecular analysis.

Riley N.D. & E.J. Godfrey,1921 : Some undescribed Rhopalocera from Siam.
J. nat. Hist. Soc. Siam 4(3):167-190, 4pls.

Nishimura, M.,2008 : Taxonomic information on the genus Ragadia (Lepidoptera, Nymphalidae) in Indo-China.
Tyô to Ga 59(2):107-116.

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.

♂, Nan, Thailand.	♀, Nan, Thailand.
♂ (territorial behavior), Nan, Thailand.	♂, Nan, Thailand.

1998.12.29 - 2025.03.31.