Chaerocampa [sic] lunata Rothschild, 1900, Novit. zool. 7: 274. Type locality: India, Assam [Meghalaya], Khasia Hills [Khasi Hills].
Synonyms. Chaerocampa lunata Rothschild, 1900.
Synonyms. Rhagastis lunata sikhimensis Rothschild & Jordan, 1903.
Synonyms. Rhagastis lunata gehleni Bender, 1942.
Synonyms. Rhagastis lunata yunnanaria Chu & Wang, 1980.
Synonyms. Rhagastis lunata yunnana Chu & Wang, 1983.
Wingspan: 72--86mm. Forewing upperside with a characteristic bluish-white submarginal line formed of crescent-shaped marks the horns of which are directed basally. Both wings pinkish-red, with traces of ochreous ground colour distally. Black basal area of forewing reduced to a streak or patch behind the discal cell. Hindwing upperside with a well-defined orange-beige median band extending to Rs, indented at M2, and including a series of vein dots. Labial palp segment 1 apical cavity not large but distinct; segment 2 not narrowed towards base. Antenna longer and thicker than in all other Rhagastis species except Rhagastis gloriosa (from which it differs in the lack of dark red bands on the forewing upperside); apical black scaling confined to the distal 2-6 segments. External row of spines on first protarsal segment simple, or irregularly doubled at base.
In the male genitalia, harpe similar to Rhagastis olivacea, shorter and stouter than Rhagastis gloriosa. Aedeagus similar to Rhagastis olivacea but left lobe of apical process much shorter.
China: 12.vi (Yunnan).
Larval hostplants. Unknown.
China: Yunnan (nr. Yingjiang, Xima, 2080m; Pingbian Daweishan [Nature Reserve], 1500m; Gaoligong Shan; Changning Co., Songzhishanding, 2500m); south Xizang/Tibet (Mutu, Namjagbarwa region, 2000m (Wang, 1988); Zhangmu, 2200m).
Nepal, northeastern India, Thailand, southwestern China, Laos (Xiengkhouang Province), Vietnam.