Cechenena subangustata Rothschild, 1920, Ann. Mag. nat. Hist. (9) 5: 482. Type locality: [Indonesia,] Sumatra [Sumatera], Benkoelen District [Bengkulu], Lebong Tandai.
This species has been confused with C. lineosa (Walker), but, according to Inoue (1990), can be separated by the following: larger; in fresh specimens forewing green all over (in C. lineosa the green area is confined to costal and subterminal areas); hindwing underside blackish basal area broader and wider; both wings more yellowish (less reddish) below. In the male genitalia, harpe much thicker than in C. lineosa, with serrate apical flap of aedeagus transversely wide and narrow. In the female genitalia, sigum slenderer and longer than in C. lineosa.
Individuals from Indonesia (Borneo, Sumatra) and Peninsular Malaysia are, on average, larger than Taiwanese ones.
China: 12-13.vi (Yunnan). Taiwan: vii (Taichung Hsien); viii (Chiai Hsien; Taichung Hsien).
OVUM:
LARVA:
PUPA:
Larval hostplants. Unknown.
China: Yunnan (Xima, nr. Yingjiang, 2080m).
Taiwan: Taipei Hsien (Fushan); Taichung Hsien (Kukuan; Lishan); Chiai Hsien (Alishan).
In Taiwan this species is much rarer than C. lineosa (Inoue, 1990).
Nepal, northeast India, Thailand, southwestern China, Taiwan, Malaysia (Peninsular, Sarawak), Indonesia (Sumatra, Java, Kalimantan).
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