1951-1954 Four parts in four. 1137 p., 4 plates, 1 map, 223 text figures in part I, numerous others in the other three parts, publisher's green black-printed cloth (Reisebericht ), paperbound with original printed covers (the three Wissenschaftliche Bearbeitungen).This work deals mainly with Coleoptera and Diptera of Peru, except, of course, the well-illustrated Reisebericht, which has over 200 photos of landscapes, people, etc., and smaller sections on, e.g., Amphipoda, and Amphibia and Reptilia. The latter, by Mertens, contains the description of a new species of snake. The scientific parts contain descriptions and illustrations of numerous new species. Front wrapper of part IV lacking. Otherwise a very good complete set.