An update and revision of the fauna of Morocco (Hymenoptera, Apoidea, Andrenidae) with the description of eleven new North African species.

Morocco has a diverse bee fauna, but one that has also been relatively understudied in recent years. Here a revision of the species-rich genus is presented that reveals eleven new species for science and substantially improves our understanding of North African . From Morocco, Andrena (Aciandrena) semiadesus Wood, , Andrena (Aciandrena) triangulivalvis Wood , Andrena (Campylogaster) sparsipunctata Wood , Andrena (Carandrena) hebescens Wood , Andrena (Cnemidandrena) niveofacies Wood , () Wood , Andrena (Notandrena) acutidentis Wood , Andrena (Poliandrena) breviceps Wood , and Andrena (Poliandrena) farinosoides Wood are described and their ecology is discussed. Andrena (Aciandrena) astrella Warncke, 1975 is synonymised with Andrena (Aciandrena) fulica Warncke, 1974 The unknown female of Andrena (Nobandrena) ounifa Warncke, 1974, and the unknown male of Andrena (Poliandrena) guichardi Warncke, 1980 are described. () Wood from Tunisia is described due to its similarity to . Andrena (Poecilandrena) nigriclypeus Wood from Algeria is also described as it was collected within 10 km of the Moroccan border. A further 18 species are recorded in Morocco for the first time. Andrena (Melandrena) nitida (Müller, 1776) and Andrena (Notandrena) nitidiuscula Schenck, 1853 are removed from the Moroccan list due to historic problems in the application of these names to Mediterranean taxa.