A new bee genus from the pampas of eastern Argentina, with appended notes on the classification of “ paracolletines ” (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. Author Gonzalez, Victor H. Undergraduate Biology, and Department of Ecology & Evolutionary Biology, 1200 Sunnyside Avenue, University of Kansas, Lawrence, Kansas 66045, USA (vhgonza @ ku. edu). text Journal of Melittology 2022 2022-01-24 2022 109 1 39 http://dx.doi.org/10.17161/jom.i109.16424 journal article 10.17161/jom.i109.16424 2325-4467 13146121 6C96BAB7-7AF6-4B8B-A2EF-08BD9F3A1344 Aglaocolletes Engel , new genus ZooBank: urn:lsid:zoobank.org:act: A47158FD-CD9F-4320-BB20-773AABABB1C9 TYPE SPECIES : Leioproctus ( Leioproctus ) megachalcoides Michener, 1965 . DIAGNOSIS: This is a genus of large, robust bees with metallic olive green integument. The genus has the scape surpassing the level of the median ocellus; a slender, parallel-sided pterostigma; metanotum without a medial tubercle; the basal area of the propodeum shorter than the metanotum and not delimited posteriorly by a carina from the vertical surface; and the metasomal terga without defined apical setal bands but instead with dense, short, erect setae on the discs and rows of longer subapical setae (at the end of the erect setal patches) overarching the apical marginal zones. ETYMOLOGY: The new genus-group name is a combination of the Ancient Greek adjective āglaós ( ᾱγλᾰός , meaning, “splendid” or “shining”) and kollitís ( κολλητής , meaning, "gluer" or "one who glues"). The gender of the name is masculine.