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Bombus ruderarius operaia, 6-8-2002, strada Priula sopra Ponte dell'Acqua (Mezzoldo, BG), 1500 m, radura in bosco di abeti
foto: regina, 18-5-2003, Menconico (PV), 1110 m, pascoli umidi presso passo Scaparina foto: maschio; 9-8-2004, versante E del Montù (Mezzoldo, BG), pascoli, 1770 m foto: regina, 24-6-2006, Mezzoldo (BG), 1800 m, pendici S del Montù foto: maschio, 2-7-2006, Castellaro (PV), 750 m, pascoli foto: regina, 29-6-2008, versante N del Montù (Mezzoldo, BG), 1770 m foto: |