Complete set of a standard hymenopterological work on ichneumon wasps by the German entomologist Otto Schmiedeknecht (1847-1936). The set consists of 6 volumes, including a register, and 25 supplement volumes, numbered Fasc. I-XXV. "... (at the turn of the 20th century) extensive work was carried out by ichneumonologists ... All of the research done in this period has been recorded in Schmiedeknecht's (1902-1936) multivolume work, Opuscula ichneumonologica. In the division of the subfamily Tryphoninae, Schmiedeknecht followed Holmgren's system but treated the tribe Tryphonini within the limits set by Thomson ... He included 13 genera comprising some 120 species of Palearctic (predominantly European) fauna" (Kasparyan).
With some owner's annotations in the margins, slightly browned. Most of the supplements with spine reinforced and an occasional crease, but wholly untrimmed. In very good condition. Junk, Rara, pp. 150, 215; Kasparyan, Fauna of the USSR, Hymenoptera (1989) p. 92.