2010.08.25 Vienna XXII. (Hausgraben - bayou 153 m AMSL).Oligolectic on Dipsacaceae family.German name: "Dipsacaceen-Sandbiene" (couldn't find a German name) (+ Borsten-Karde)ID: Johann Neumayer @ naturbeobachtung_at; he mentions there that this species is oligolectic, i. e. collecting pollen only from plants of the Dispacaceae family (in Austria preferably from Scabiosa, Succisa and Dipsacus); I've found contradicting opinions on the www but as this man is an expert in the field I trust his judgement