author(s)
Olive Biswas, Udipta Chakraborti, Sankarsan Roy, Arna Mazumder and Kaushik Mallick

abstract
Horaga onyx onyx (Moore, 1857) (Lepidoptera: Lycaenidae: Theclinae: Horagini) is a butterfly commonly known as Variable common onyx. Within India, this species is distributed in Assam, Goa, Himachal Pradesh, Meghalaya, Nagaland, Sikkim, Uttarakhand and West Bengal. Other than India this species is reported from Bangladesh, Burma, Nepal and Thailand. This butterfly is mostly reported from high altitude areas. This is the first record of this species from Sunderban Biosphere Reserve, which is under the Indo-Gangetic Plain, a biogeographical region of India, with an elevation of +6 to +9 meters. H. onyx (Moore, 1857) is protected under Schedule II part II of the Wildlife (Protection) Act, 1972.