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Bombus bimaculatus regina, 16-4-2005, Princeton, NJ (USA), Institute for Advanced Study, 31 m
foto: regina, 19-4-2005, Princeton, NJ (USA), estremità SO degli Institute Woods, campo incolto, 27 m foto: operaia; 30-5-2007, Institute for Advanced Study, Princeton, NJ (USA); 27 m foto: regina; 1-6-2007, Griggstown Native Grassland Preserve, Griggstown, NJ (USA); 25 m foto: |