London, The British Museum of Natural History, 1936; [AND] E. W. Classey, 1981. Two works in two. 4to (27.5 x 18.9 cm). vii, 407 pp.; 104 plates with explanatory text leaves. Publisher's aquamarine, blind-stamped cloth. Spine with gilt title. [AND] Large 8vo (25.5 x 16.0 cm). 17 pp.; one text figure (numbered 501b), and two plates (numbered 105-106).

An excellent copy of a magnificent monograph on the brown ringlet butterflies of the family Satyridae, which occurs in the Alpine and Subalpine zones of the Holarctic region. Written and illustrated by the Irish entomologist Brisbane Charles Somerville Warren (1887-1979). Between 1902 and 1960 Warren amassed an extensive collection of nearly 21,000 specimens of Palaearctic Lepidoptera, including 6,200 specimens of Erebia, which are now housed in the Natural History Museum, London. He published 112 scientific papers in all, but this is his magnum opus. De Worms describes his photos as "superb". The plates contain 1,648 individually numbered illustrations. This copy includes the much later (1981!) Supplement, written by Warren, and edited by his daughter and fellow lepidopterologist, Elizabeth J. M. Warren. Provenance: with on the front pastedown a pictorial, lepidopterological bookplate of the French medical biologist and entomologist Paul Thiaucourt (1928-2022), whose collection is now in the Muséum national d'Histoire naturelle in Paris. Corners slightly bumped, otherwise a meticulous copy, as new. It is rare to see this work, in particular with the supplement included. Worms, C. G. M. de (1981) " Obituary. Brisbane Charles Somerville Warren ( 1887-1979)". Entomologist's Record and Journal of Variation 91: 111-112; Vane-Wright & Ackery (1981). " The B.C.S. Warren Collection and its type material". Entomologist's Record and Journal of Variation 93: 1-3, 112-115, 172-175.