Figures 18-20 from: Engel M, Hinojosa-Díaz I (2011) Euglossa williamsi, a new species of orchid bee from the Amazon Basin of Ecuador and Peru, with notes on its taxonomic association and biogeography (Hymenoptera, Apidae). ZooKeys 159: 49-63. https://doi.org/10.3897/zookeys.159.2239 - Hinojosa-Díaz, Ismael (2011)