painting by Frederick William Frohawk (1861–1946), National Museum Wales, National Museum Cardiff

London: R.H. Porter, 1890-1899.

London,Printed by order of the Trustees of the British museum,1919. | Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

London: Caxton Pub. Co., [1907-08]

Hull ;Brumby & Clarke, [1907?-1908?].

London, Brumby & Clarke[1896-98]

scholarly article by Lord Walsingham published March 1891 in Transactions of the Royal Entomological Society of London

painting by Frederick William Frohawk (1861–1946), National Museum Wales, National Museum Cardiff

painting by Frederick William Frohawk (1861–1946), National Museum Wales, National Museum Cardiff