cataloguer at the Natural History Museum and was put in charge of work on dragonflies. She joined a six-month expedition to Matto Grosso, Brazil in 1927, and returned with samples of 38 of species of dragonfly. Three of these species were previously unidentified. The species Corphaeschna longfieldae is named in her honour. By 1937, Longfield had become an international authority on the subject of dragonflies and published a book entitled The Dragonflies of the British Isles. The book quickly sold out, and earned her the name "Madame Dragonfly". She was appointed an honorary associated of the Natural History Museum in 1948. In 1979 she donated dragonfly and damselfly specimens to the Royal Irish Academy, as well as her written records and more than 500 natural history books. In 1983 she was elected the first Honorary Member of the British Dragonfly Society. An exhibition entitled The Longfield exhibition was opened in the Royal Irish Academy on Dawson Street in 2006. Death Before her retirement from the Natural History Museum, Longfield purchased an apartment in Kensington, London, where she resided until her eventual retirement at age 60. In 1957, she returned to Castle Mary, the family estate, in Cloyne, County Cork where she lived until her death. She died aged 96 on 27 June 1991 and was buried in St. Coleman's Church of Ireland Cathedral, close to her home in Cloyne. Legacy The Longfield Roberts Collection, a photograph album belonging to Longfield and taken and developed during the St George Expedition to the South Sea Islands in 1924 to 1925, is held by the Royal Irish Academy. The c.800 photographs mainly depict the people and life on the ship and the flora and fauna of the Pacific Islands. Works 1914. Royal Army Service Corps, driver (1914–1916) 1916. Aeroplane factory worker (1916–1918) 1924. St. George Expedition, Assistant Entomologist (unpaid)(1924–1925) 1936. Studies on African Odonata, with synonymy, and descriptions of new species and subspecies. Trans. R. ent. Soc. London 85(20): 467–498. (1936) Contribution à l'étude de la faune du Mozambique. Voyage de M.P. Lesne (1928–1929). 23e note – Odonata. Memórias e Estudos do Museu Zoológico da Universidade de Coimbra, 89: 1–2 . Insecta. C. Longfield. (1945) – The Odonata of South Angola. Arquivos do Museu Bocage, 16, Lisboa. (1955) – The Odonata of N. Angola. Publicações Culturais, Companhia de Diamantes de Angola (Diamang), Lisboa, 27: 11–63. Biologia. Entomologia. Angola. (1959) – The Odonata of