S. Mahunka szerk.: Folia Entomologica Hungarica 61. (Budapest, 2000)

Etymology — Named for Fyodor Godunov-Cherdyntsev at the suggestion of Nabokov scholar Dr. Zoran Kuzmanovich (see discussion). DISCUSSION Key to the species of idas-species group la FW length more than 12 mm various Plebejus (Lycaeides) species* lb FW length less than 12 mm 2 2a Wing dorsum unicolorous brown, sometimes with slight male fore wing costal blue tint. Tibet, SW Mongolia Plebejus subsolanus boreas Bálint, 1989 2b. Wing dorsum blue, with wide brown female fore wing margin and also brown wing costa 3 3a. Ventral ground colour whitish grey or beige, basal area only with few gleaming green scales. Uzbekistan, Turkmenistan P. christophi christophi (Staudinger, 1874) 3b Ventral ground colour dark grey or brownish grey, basal area with extended suffusion of gleaming blue scales. Tibet Plebejus fyodor sp. n. Figs 3-4. Paratype female of Plebejus fyodor sp. n. (HNHM) — 3: dorsum, 4: ventrum Historical note — Under the heading "Remarks on the Eurasian Group" in his 1949 paper, Nabokov reflects on a specimen taken in "Szechuan" (Nabokov 1949: 485, pi. 4., fig. 27). He writes, that the specimen does not represent Lycaena ganssuensis GrumGrshimailo, 1891 (p. 450, syntypes from Amdo, as geographic variation of Lycaena argus), neither Lycaena aegina Grum-Grshimailo, 1891 (p. 451, syntypes from Boro, Tien Shan, as species of Lycaena), but clearly identical with "Lycaena aegina Leech [1893]". The latter is a taxon Nabokov appears to attribute to Leech, vis-a-vis Leech's p. 303 and a holotype of Grum-Grshimailo from "Bogdo Ola in Eastern Thibet". The senior author located and studied the type material of both mentioned Grum-Grshimailo taxa. He can confirm that the statement of Nabokov was right (Bálint 1999: 8). The specimen figured by Nabokov does not correspond with the types of P. fyodor possessing different wingshape and much stronger ventral maculation. However, the "taxon" attributed to * In alphabetical order: Plebejus argyrognomon (Bergsträsser, [1779]), P. Idas (Linnaeus, 1761), P. melissa (Edwards, 1873), P. samudra (Moore, [1875]) and P. subsolanus (Eversmann, 1851).