Henry John Elwes, FRS was a British botanist, entomologist, author, lepidopterist, collector and traveller who became renowned for collecting specimens of lilies during trips to the Himalaya and Korea. He was one of the first group of 60 people to receive the Victoria Medal of the Royal Horticultural Society in 1897. Author of Monograph of the Genus Lilium (1880), and The Trees of Great Britain & Ireland (1906–1913) with Augustine Henry, as well as numerous articles, he left a collection of 30,000 butterfly specimens to the Natural History Museum, including 11,370 specimens of Palaearctic butterflies.
The Chumbi Valley, called Dromo or Tromo in Tibetan, is a valley in the Himalayas that projects southwards from the Tibetan plateau, intervening between Sikkim and Bhutan. It is coextensive with the administrative unit Yadong County in the Tibet Autonomous Region of China. The Chumbi Valley is connected to Sikkim to the southwest via the mountain passes of Nathu La and Jelep La.
Iambrix salsala, the chestnut bob, is a butterfly belonging to the family Hesperiidae, that is found in parts of South Asia and Southeast Asia.
Teinopalpus imperialis, the Kaisar-i-Hind, is a rare species of swallowtail butterfly found from Nepal and north east India to north Vietnam. The common name literally means "emperor of India". The Kaisar-i-Hind is much sought after by butterfly collectors for its beauty and rarity. The green iridescence of the wings has been found to be due to three-dimensional photonic structure of the scales and is the subject of much research.
Atrophaneura varuna, the common batwing, is a butterfly found in India and Southeast Asia that belongs to the swallowtail family, and more specifically, the batwings group of Atrophaneura, comprising tailless black swallowtail butterflies.
Parnassius hannyngtoni, the Hannyngton's Apollo, is a high-altitude butterfly which is found in India. It is a member of the snow Apollo genus (Parnassius) of the swallowtail family (Papilionidae). Some sources also spell the name as P. hunnygtoni. It is named after Frank Hannyngton who obtained the specimen from the Chumbi Valley.
Pieris chumbiensis, the Chumbi white, is a small butterfly of the family Pieridae, the yellows and whites. It is found in the Chumbi Valley of Sikkim in India, and was once considered a race of P. dubernardi.
Capila zennara, commonly known as the pale striped dawnfly, is a species of hesperid butterfly found in tropical Asia.
Yatung or Yadong, also known as Shasima , is the principal town in the Chumbi Valley or Yadong County in the Tibet Autonomous Region of China. It is also its administrative headquarters.
Aulocera padma, the great satyr, is a brown (Satyrinae) butterfly that ranges across the Himalayas to Assam, northern Burma and western China.
Aulocera brahminoides is a brown (Satyrinae) butterfly that is found in the Himalayas.
Coladenia is an Oriental genus of spread-winged skippers in the family Hesperiidae. They are found throughout most of Southern, Southeastern, and Eastern Asia.
Lethe scanda, the blue forester, is a species of satyrine butterfly found in parts of Asia. It is known from Sikkim and Bhutan.
Lethe margaritae, the Bhutan treebrown, is a species of Satyrinae butterfly found in the Indomalayan realm where it occurs in Bhutan and Sikkim
Cho La or Cho-la is a mountain pass in the Chola range of the Himalayas. It connects the Indian state of Sikkim with China's Tibet Autonomous Region. It is situated around four miles to the north-west of Nathu La.
Issoria altissima is a small brown-chequered-with-black (fritillary) butterfly found in the Palearctic realm region that belongs to the Nymphalidae family. It was first described by Henry John Elwes in 1882. It is found in the Indian state of Sikkim and in Bhutan, Yarlung and Tibet.
Lethe tristigmata, the spotted mystic, is a species of Satyrinae butterfly found in the Indomalayan realm. In 2015, it was also recorded from Neora Valley National Park in West Bengal, India.
