Observations on gynes and drones around nuptial flights in the stingless bees Tetragonisca angustula and Melipona beecheii (Hymenoptera, Apidae, Meliponinae) Johan Wilhelm van Veen and Marinus Jan SommeijerApidologie, 31 1 (2000) 47-54DOI: https://doi.org/10.1051/apido:2000105
