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The paper presents new records of the following six very rare or scarcely recorded species of short-tongued bees of the genus Andrena Fabricius, 1775 in Poland: A. (Notandrena) nitidiuscula Schenck, 1853; A. (Lepidandrena) pandellei Perez, 1895; A. (Lepidandrena) paucisquama Noskiewicz, 1924; A. (Notandrena) pontica Warncke, 1972; A. (Poecilandrena) potentillae Panzer, 1809 and A. (Poecilandrena) viridescens Viereck, 1916. The studies were based on museum collections as well as the author’s own collections. During the research approximately 21,000 specimens, representing 95 taxa, of mining bees of the genus Andrena from Poland were identified. The species discussed in the paper are known from single or just a few stands in the country. The following information is provided for each species: short diagnosis, remarks on general distribution, bionomics, published records from Poland and confirmed Polish records based on studied collections. The text is accompanied by SEM micrographs showing diagnostic characters and distribution maps.

S u m m a r yThe first record of Andrena florivaga E v e r s m a n n , 1852 is reported from Poland on the basis of specimens collected in the Kampinos National Park (Mazovian Lowland). Diagnosis, data on localities, biology, and general distribution of the species are provided. One female and five males were caught on a mowed fresh meadow and fallow fields with the use of water pan-traps (Moericke traps), during the 2003 -2004 time period. The main morphological characteristics distinguishing Andrena florivaga from the very similar Andrena dorsalis Brullé, 1832 species and from the other species of the subgenus Lepidandrena are: in the case of females -the width of facial foveae and colouration of legs, and in the case of males -the length of the first flagellar segment, colouration of clypeus, and pubescence of gonostyles. Andrena florivaga can be found from France in the west, to Central Siberia (Baikal lake region) in the east, and Turkey in the south. Poland is the northernmost locality of the species.

The wild bees Andrena assimilis Radoszkowski, 1876, and Andrena gallica Schmiedeknecht, 1883, are morphologically very similar species and by some authors they are treated as one taxon – A. assimilis. Some other authors treat A. gallica as a subspecies of A. assimilis, others assert that both A. gallica and A. assimilis are valid species. After analysing the morphological features, we confirm that they should be treated as two distinct species. The following characters help to separate A. gallica from A. assimilis: in the case of females – the colouration of the stigma and veins in the forewing, in the case of males – the microsculpture of the surface of the metasomal terga, the punctation of terga II–III, and the width of the edeagus. Andrena gallica was reported in Poland in the first half of the twentieth century from the following regions: Baltic Coast, Kraków-Wieluń Upland, Małopolska Upland, and Wielkopolska-Kujawy Lowland. Due to the synonymy, these records were included in the distribution of A. assimilis. After more than 50 years, the occurrence of A. gallica in Poland has been confirmed. The new record of the species is reported based on the specimen collected in Kampinos National Park (Mazovian Lowland). In 2004, one male was collected on fallow land. Water pan-traps (Moericke traps) were used to do the collecting. Diagnoses of both species, data on their biology, as well as distribution, are provided.

The paper presents new records of the following six very rare or scarcely recorded species of short-tongued bees of the genus Andrena Fabricius, 1775 in Poland: A. (Simandrena) congruens Schmiedeknecht, 1883; A. (Taeniandrena) lathyri Alfken, 1899; A. (Simandrena) lepida Schenck, 1861; A. (Poliandrena) polita Smith, 1847; A. (Suandrena) suerinensis Friese, 1884 and A. (Poliandrena) tarsata Nylander, 1848. This is the second contribution concerning the rare species of the genus Andrena Fabricius, 1775 in Poland. The studies were based on museum collections as well as the author’s own collections. During the research, approximately 21,000 specimens of mining bees of the genus Andrena from Poland were identified representing ninety-five taxa. The species discussed in the paper are known from just a few records in the country. The following information is provided for each species: short diagnosis, remarks on general distribution, bionomics, published records from Poland and confirmed Polish records based on studied collections. The text is accompanied by SEM micrographs showing diagnostic characters and distribution maps.