Cypa decolor pallens Jordan, 1926, Novit. zool. 33: 380. Type locality: Northwest Himalayas [India, Uttarakhand,] Masuri [Mussoorie], 14.iv.1906.
Synonym. Cypa decolor subsp. pallens Jordan, 1926.
Note. Proposed as a subspecies of Cypa decolor. Raised to species status by Jordan, 1931, Novit. zool., 36: 238. Synonymized with Cypa uniformis as a subspecies by Kitching & Cadiou, 2000, Hawkmoths of the World: 42. Reinstated as a species by Brechlin & Kitching, 2014, Entomo-Satsphingia, 7(2): 6.
Wingspan: 65--68mm. Larger than the very similar Cypa enodis Jordan, 1931; paler above and below. In female, ante-vaginal ridge and lateral submembranaceous portion of segment 8 less wrinkled, and the two sclerites of eighth sternite larger, smooth, more glossy (Bell & Scott, 1937).
China: vi (Kyirong/Gyirong/Jilong, XigazÍ/Rikaze/Shigatse Prefecture, Xizang/Tibet).
Larval hostplants. Unknown.
China: Xizang/Tibet (Kyirong/Gyirong/Jilong, XigazÍ/Rikaze/Shigatse Prefecture, 2880m).
From Mussoorie, Uttarakhand (India) eastwards across Nepal, Sikkim (India), Bhutan, Arunachal Pradesh (India) to Xizang/Tibet (China) around Kyirong/Gyirong/Jilong, XigazÍ/Rikaze/Shigatse Prefecture.