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Abstract
The composite nature of four type series of bird taxa in the collection of the National Museum of Natural History, Naturalis, Leiden requires the selection of lectotypes, which will contribute to taxonomic stability. Appropriate specimens are duly designated: RMNH 87171 for Falco (Lophotes) Reinwardtii Schlegel & Müller, 1841); RMNH 87194 for Buteo capensis Temminck & Schlegel, 1844; RMNH 87792 for Ptilopus humeralis iobiensis Schlegel, 1873 and RMNH 88907 for Hirundo rufula Temminck, 1835.