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Species Hylaeus leptocephalus - Slender-faced Masked Bee

Bee? - Hylaeus leptocephalus - female Hylaeus - Hylaeus leptocephalus - male Hylaeus ZH3Z0552 - Hylaeus leptocephalus - female Hylaeus leptocephalus? - Hylaeus leptocephalus - male Tiny, white-faced bee - Hylaeus leptocephalus Masked Bee - Hylaeus leptocephalus - male Hylaeus leptocephalus? - Hylaeus leptocephalus - female Hylaeus leptocephalus - male
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 Colletidae (Cellophane or Plasterer, Masked, and Fork-tongued Bees)
Genus Hylaeus (Masked Bees)
No Taxon (Subgenus Hylaeus, Nominate Masked Bees)
Species leptocephalus (Slender-faced Masked Bee)
Synonyms and other taxonomic changes
Prosopis leptocephala Morawitz, 1871["1870"]; Hylaeus bisinuatus Förster, 1871; Prosopis discrepans Schenck, 1875; Prosopis stevensi Crawford, 1913; Prosopis incompleta Alfken, 1937["1936"]; Hylaeus (Hylaeus) stevensi (Crawford, 1913)
Explanation of Names
Author: Morawitz, 1871.

One of the junior synonyms long applied to the introduced North American population honors Orin A. Stevens of North Dakota.
Female: Length 5-6 mm.(1)
Male: Length 4-6 mm.(1)
Widespread in the US excluding Texas to Alabama.
Has been found nesting with halictid Bees in cavities within an earthen bank. Barrows, 1975
From May until September.
Has a tendency toward oligolecty. Collects pollen almost primarily from Fabaceae, especially Melilotus, a plant introduced from Europe. The Hosts section on its Discover Life species page lists known floral associations based on specimen records and images.
Non native, introduced, presumably before 1912.
Print References
Snelling R.R. (1970) Studies on North American Bees of the Genus Hylaeus. 5. The subgenus Hylaeus, s. str. and Paraprosopis (Hymenoptera: Colletidae). Contributions in Science, Natural History Museum of Los Angeles County (180): 1-59.(Full Text) Listed on page 26 as Hylaeus (Hylaeus) stevensi (Crawford, 1913)
Works Cited
1.Bees of the eastern United States
Mitchell T.B. 1962. Tech. Bull. (NC Agric. Exp. Sta.): No. 141 (538 pp.), 1960; and No. 152 (557 pp.).