Two new genera of South American Eulonchopriini (Hymenoptera: Colletidae) Author Engel, Michael S. Division of Entomology, Natural History Museum, and Department of Ecology & Evolutionary Biology, 1501 Crestline Drive - Suite 140, University of Kansas, Lawrence, Kansas 66045 - 4415, USA (msengel @ ku. edu). & Division of Invertebrate Zoölogy, American Museum of Natural History, Central Park West at 79 Street, New York, New York 10024 - 5192, USA. text Journal of Melittology 2021 2021-12-04 2021 107 1 24 http://dx.doi.org/10.17161/jom.i107.16038 journal article 10.17161/jom.i107.16038 8f709bff-67d9-445d-8a52-35b9c81aa027 2325-4467 8057561 urn:lsid:zoobank.org:pub:5F570286-5939-4B3A-A290-9131360D55A8 Tribe Eulonchopriini Moure As noted in the introductory comments, the inclusion of E . simplicicrus within Eulonchopria renders the circumscription of the genus problematic and obviates most of the traits that serve to distinguish the genus. Accordingly, as E. simplicicrus is related to but clearly outside of Eulonchopria s.l . , removing the former to its own genus retains the integrity of Eulonchopria as it has historically been understood, and emphasizes the unique combination of features embodied by E. simplicicrus and the new species described herein. Given that E. simplicicrus remains known only from the male holotype , while the new species is known from both sexes, I’ve selected the later to serve as type species.