Appearance
This species is similar to the European "A. atropos" but differs in having two medial bands on the underside of the forewing, instead of one, and usually no dark bands across the ventral surface of the abdomen. The skull-like marking is darker and there is a faint blue tornal dot enclosed by a black submarginal band on the hindwing upperside. The forewing discal spot is orange; in "A. atropos" it is usually white.There are two described subspecies, "A. s. styx" and "A. s. medusa" Moore, but they intergrade widely, and authorities presently consider that "A. s. medusa" is just a wet zone/season form and not taxonomically distinct.
Distribution
The variant referred to as "A. styx medusa" occurs throughout eastern continental Asia, from northeastern China and Japan, south through eastern China and Vietnam to Peninsular Malaysia and peninsular Thailand. It is also found throughout the islands of the Malay Archipelago. "A. s. styx" occurs from north-central and western China westward across northern Thailand, Myanmar, Bangladesh, India, Sri Lanka, Nepal, Pakistan and Iran to Saudi Arabia, Iraq, Jordan and Israel.References:
Some text fragments are auto parsed from Wikipedia.
