Verity was born in Florence on 20 May 1883, the elder son of Richard Henry Manners Verity (1844 - 1926) and his wife Matilda daughter of Cav. Sebastiano Fenzi and Emily Verity. Roger Verity married, on 1 Jun 1922, Donna Giulia dei Principi Gallarati–Scotti (b 20 Nov 1887, d 17 Jun 1938) daughter of Don Gian Carlo, Prince di Molfetta, Duca di San Pietro in Galatina, and Luigia Melzi D'Eril dei Duchi di Lodi.
Roger Verity was a Lepidopterist and the author of over 150 papers and books including Rhopalocera Palaeartica. Papilionidae and Pieridae (1905-1911, 454 pages), Le Farfalle diurne d’Italia (Butterflies of Italy (volumes, 1940-1953, 1 688 pages) and Les variations géographiques et saisonnières des Papillons diurnes en France (Geographic and seasonal variation of the butterflies of France) (three volumes, 476 pages). He was responsible for the naming of 2-3000 butterflies, his collection of close to 250,000 butterflies together with his library is now in La Specola Museum, Florence.
Roger Verity created the term exerges "[Exerges] always inhabit different land-areas, except in particular cases, such as large mountain chains and plains, which afford very different surroundings and climates within the same area; they often consist in a long chain of races stretching even from one continent to another ..." The modern term is cline.
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Translated from French Wikipedia Cesare Conci et Roberto Poggi (1996), Iconography of Italian Entomologists, with essential biographical data. Memorie della Società entomologica Italiana, 75 : 159-382 Verity Family Collection at Glamorgan Records Office. See Wikipedia under Fenzi.
- Barsanti, G. and Chelazzi G Il Museo di storia naturale dell'Università di Firenze, Volume 1 Firenze University Press Electronic Version at Google Books. Portrait.
- Otakar Kudrna, 1983 An annotated catalogue of the butterflies named by Roger Verity. J. Res. Lepid. 21 (1982) : 1-105.
- Otakar Kudrna and E. Balletto, 1984 An annotated catalogue of the skippers named by Roger Verity. J. Res. Lepid. 23 : 35-49.