Cechenena subangustata Rothschild, 1920, Ann. Mag. nat. Hist. (9) 5: 482. Type locality: [Indonesia,] Sumatra [Sumatera], Benkoelen District [Bengkulu], Lebong Tandai.
Synonym. Cechenena subangustata Rothschild, 1920.
This species has been confused with Cechetra lineosa (Walker), but, according to Inoue (1990), can be separated by the following: larger; in fresh specimens forewing green all over (in Cechetra lineosa the green area is confined to costal and subterminal areas); hindwing underside blackish basal area broader and wider; both wings more yellowish (less orange-beige) below. In the male genitalia, harpe much thicker than in Cechetra lineosa, with serrate apical flap of aedeagus transversely wide and narrow. In the female genitalia, sigum slenderer and longer than in Cechetra lineosa.
Individuals from Indonesia (Borneo, Sumatra) and Peninsular Malaysia are, on average, larger than Taiwanese ones.
In Taiwan, a species of the montane forest zones from 400-2400m (Fu, Ronkay & Lin, 2013)
China: 12-13.vi (Yunnan). Taiwan: iv (Ilan Hsien); v (Nantou Hsien); vii (Taichung Hsien); viii (Chiai Hsien; Taichung Hsien; Kaohsiung Hsien); ix-xi (Nantou Hsien).
Larval hostplants. Unknown.
China: Yunnan (Xima, nr. Yingjiang, 2080m; Gaoligong Shan).
Taiwan: Taipei Hsien (Fushan); Taichung Hsien (Kukuan; Lishan); Chiai Hsien (Alishan); Hualien Hsien (Chian, 1950m); Ilan Hsien (Qilan, 700m); Nantou Hsien (Meifeng, 2100m; Wushe); Kaohsiung Hsien (Tengzhi, 1550m).
In Taiwan this species is much rarer than Cechetra lineosa (Inoue, 1990).
Nepal, northeast India, Thailand, southwestern China, Taiwan, Malaysia (Peninsular, Sarawak), Indonesia (Sumatra, Java, Kalimantan).