- Bicolletes abdominalis (Jörgensen, 1912)
- Bicolletes basirufa (Schrottky, 1920)
- Bicolletes chrysostoma (Cockerell, 1917)
- Bicolletes coloratipes (Cockerell, 1933)
- Bicolletes fasciata (Schrottky, 1920)
- Bicolletes ferruginea Moure, 1954
- Bicolletes friesei (Jörgensen, 1912)
- Bicolletes leucostoma (Cockerell, 1917)
- Bicolletes longipes (Jörgensen, 1912)
- Bicolletes lucidula (Cockerell, 1933)
- Bicolletes neotropica Friese, 1908
- Bicolletes orientalis (Vachal, 1904)
- Bicolletes pseudozonata Moure, 1954
- Bicolletes rufiventris (Spinola, 1851)
- Bicolletes saltensis Friese, 1908
- Bicolletes spegazzini (Jörgensen, 1912)
- Bicolletes sticta Moure, 1954
- Bicolletes stilborhina Moure, 1954
- Biglossa thoracica Friese, 1906
- Biglossidia aenea (Friese, 1906)
- Biglossidia chalybaea (Friese, 1906)
- Biglossidia deceptrix Moure, 1949
- Biglossidia longicornis (Michener, 1989)
- Brachyglossula ancasti Roig-Alsina & Schlumpberger, 2008
- Brachyglossula communis Trucco-Aleman, 1999
- Brachyglossula leucothorax Trucco-Aleman, 1999
- Brachyglossula martinezi Trucco-Aleman, 1999
- Cadeguala albopilosa (Spinola, 1851)
- Cadeguala occidentalis (Haliday, 1836)
- Camposapis larejae (Compagnucci & Roig-Alsina, 2008)
- Caupolicana bicolor Friese, 1899
- Caupolicana dimidiata Herbst, 1917
- Caupolicana egregia Friese, 1906
- Caupolicana friesei Jörgensen, 1909
- Caupolicana fulvicollis Spinola, 1851
- Caupolicana gaullei Vachal, 1901
- Caupolicana lugubris Smith, 1879
- Caupolicana mendocina Jörgensen, 1909
- Caupolicana mystica Schrottky, 1902
- Caupolicana nigriventris Friese, 1904
- Caupolicana ochracea (Friese, 1906)
- Caupolicana ruficollis Friese, 1906
- Caupolicana smithiana Friese, 1908
- Caupolicana steinbachi Friese, 1906
- Cephalocolletes crassipunctata Urban, 1995
- Cephalocolletes laticeps (Friese, 1906)
- Cephalocolletes rugata Urban, 1995
- Chilicola (Capitatiscopa) biguttata Packer, 2007
- Chilicola (Chilicola) venticola Packer, 2004
- Chilicola (Chilioediscelis) araucana Toro & Moldenke, 1979
- Chilicola (Chilioediscelis) mirzamalae Willis & Packer, 2007
- Chilicola (Chilioediscelis) patagonica Toro & Moldenke, 1979
- Chilicola (Chilioediscelis) sardonyx Willis & Packer, 2007
- Chilicola (Obesicola) catamarcense Packer, 2007
- Chilicola (Obesicola) obesifrons Packer, 2007
- Chilicola (Oediscelis) chalcidiformis (Meade-Waldo, 1914)
- Chilicola (Oediscelisca) clavillo Packer, 2007
- Chilicola (Oediscelisca) tricarinata Packer, 2007
- Chilicola (Oediscelisca) tricarinatoides Packer, 2007
- Chilicola (Oroediscelis) abrebotellas Packer & Dumesh, 2019
- Chilicola (Oroediscelis) calchaqui Packer & Dumesh, 2019
- Chilicola (Oroediscelis) capillitas Packer & Dumesh, 2019
- Chilicola (Oroediscelis) carpenteri Packer & Dumesh, 2019
- Chilicola (Oroediscelis) cuyense Dumesh & Packer, 2019
- Chilicola (Oroediscelis) fritzi Packer & Dumesh, 2019
- Chilicola (Oroediscelis) goloboffi Packer & Dumesh, 2019
- Chilicola (Oroediscelis) huarpe Packer & Dumesh, 2019
- Chilicola (Oroediscelis) jaguense Packer & Dumesh, 2019
- Chilicola (Oroediscelis) roigi Packer & Dumesh, 2019
- Chilicola (Oroediscelis) rozeni Packer & Dumesh, 2019
- Chilicola (Pseudiscelis) nanula Packer, 2007
- Chilicola (Pseudiscelis) rostrata (Friese, 1906)
- Chilicola (Stenoediscelis) denisii Packer, 2007
- Chilicola (Stenoediscelis) inermis (Friese, 1908)
- Chilicola (Unicarinicola) chubutense Packer, 2007
- Chilicola (Unicarinicola) unicarinata Packer, 2007
- Chilicola liliana Packer, 2007
- Chilicola setosicornis Packer, 2007
- Colletes argentinus Friese, 1908
- Colletes azureus Friese, 1912
- Colletes bicolor Smith, 1879
- Colletes brethesi Jörgensen, 1912
- Colletes chalybaeus Friese, 1910
- Colletes clarus Jörgensen, 1912
- Colletes clematidis Jörgensen, 1912
- Colletes cognatus Spinola, 1851
- Colletes cyanescens (Haliday, 1836)
- Colletes cyaneus Holmberg, 1903
- Colletes eupogonites Moure, 1949
- Colletes flaminii Moure, 1956
- Colletes fulvipes Spinola, 1851
- Colletes furfuraceus Holmberg, 1886
- Colletes glycyrrhizae Jörgensen, 1912
- Colletes joergenseni Friese, 1910
- Colletes longiceps Friese, 1910
- Colletes lycii Jörgensen, 1912
- Colletes meridionalis Schrottky, 1902
- Colletes mourei Kuhlmann, 1999
- Colletes musculus Friese, 1910
- Colletes neoqueenensis Friese, 1910
- Colletes ornatus Schrottky, 1902
- Colletes patagonicus Schrottky, 1907
- Colletes petropolitanus Dalla Torre, 1896
- Colletes pinnatus Vachal, 1909
- Colletes quadrigenis Vachal, 1909
- Colletes schrottkyi Jörgensen, 1912
- Colletes steinbachi Friese, 1910
- Colletes vachali Jörgensen, 1912
- Colletes vicugnensis Rojas & Toro, 1993
- Colletes virgatus Vachal, 1904
- Colletes weiskei Friese, 1912
- Hemicotelles magallanes Toro & Cabezas, 1977
- Hemicotelles ruizii (Herbst, 1923)
- Hexantheda entrerriana Roig-Alsina, 2006
- Hexantheda missionica Ogloblin, 1948
- Holmbergeria cristariae Jörgensen, 1912
- Holmbergeria rubriventris (Friese, 1909)
- Hylaeus (Gnathoprosopis) euxanthus (Cockerell, 1910)
- Hylaeus (Hylaeopsis) platensis Roig-Alsina, 2024
- Patagonicola aenigma (Packer, 2007)
- Patagonicola graveli Packer, 2013
- Perditomorpha arnaui Moure, 1954
- Perditomorpha brunerii Ashmead, 1899
- Perditomorpha inconspicua (Michener, 1989)
- Perditomorpha indigoticus (Compagnucci & Roig Alsina, 2008)
- Protodicelis sp.
- Ptiloglossa aculeata Friese, 1904
- Ptiloglossa ducalis Smith, 1853
- Ptiloglossa eximia (Smith, 1861)
- Ptiloglossa giacomellii Schrottky, 1914
- Ptiloglossa matutina (Schrottky, 1904)
- Ptiloglossa pallida Friese, 1925
- Ptiloglossa psednozona Moure, 1947
- Ptiloglossa tarsata (Friese, 1900)
- Ptiloglossa willinki Moure, 1953
- Pygopasiphae mourella (Michener, 1989)
- Pygopasiphae wagneri (Vachal, 1909)
