specimens holding the down side of the capitulum by their mandibles  
  Part of: Mahlmann T, HipĆ³lito J, de Oliveira F (2014) Male sleeping aggregation of multiple Eucerini bee genera (Hymenoptera: Apidae) in Chapada Diamantina, Bahia, Brazil. Biodiversity Data Journal 2: e1556. https://doi.org/10.3897/BDJ.2.e1556