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Tribe Augochlorini - Augochlorine Green-Sweat Bees and relatives

Unidentified Insect 143 - Augochlora pura metallic bee - Augochlora pura Beautiful Green Bee - Augochlorella Bee DSC08990 - Augochloropsis metallica - female Augochlorella sp ? - Augochlora pura Halictid Augochlora pura on Joe Pye - Augochlora pura Augochlorine bee - Augochlora pura
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Halictidae (Sweat, Furrow, Nomiine, and Shortface Bees)
Subfamily Halictinae (Sweat and Furrow Bees)
Tribe Augochlorini (Augochlorine Green-Sweat Bees and relatives)
Numbers
16 spp. in 5 genera in our area, >580 spp. in 30 genera total(1)
Identification
It differs from Agapostemon by: Posterior face of propodeum without the salient rim, at least above; hind tibiae shorter than their combined tarsal segments.

The inner margin of the eye has an angle or notch – makes the eye appear to curve around the head as in this photo. The 5th tergel segment has a notch. Hard to see because of the hair but a reliable ID character.


The propodeum is smooth as in this photo (2)
Range
neotropical group(1)
Remarks
Augochlora, Augochlorella, and Augochloropsis are very difficult to tell apart from photos alone. Useful characters for Augochlora vs. Augochlorella are the clypeus, the apex of the marginal cell, and the tegula (to rule out Augochloropsis). (J.S. Ascher's comments)
Print References
Engel M.S. (2000) Classification of the bee tribe Augochlorini (Hymenoptera, Halictidae). Bulletin of the AMNH 250: 1-89. (Full Text)
Goncalves, R. B. (2016). A molecular and morphological phylogeny of the extant Augochlorini (Hymenoptera, Apoidea) with comments on implications for biogeography. Systematic Entomology, 41(2), 430-440. (Full Text)