Méridien Equatorial en Amérique du Sud, 1899–1906, 10(1919)(2):163-215. 1922. Diptères. In: Extrait du voyage de M. le Baron Maurice de Rothschild en Éthiopie et en Afrique Orientale Anglaise (1904-1905). pp. 796–836, Imprimerie Nationale, Paris. Collection Becker's collection is in the Natural History Museum of Berlin. References External links Obituary (PDF, in German) 1840 births 1928 deaths German entomologists German civil engineers Dipterists People from the Duchy of Holstein People from Plön (district) Engineers from Schleswig-Holstein