Scopa white..3
2. Abdominal terga 3-5 with conspicuous, erect black pubescence; clypeus fuscous or black pubescent..Osmia collinsiae
Pubescence of abdominal terga and clygeus entirely pale, or with only very inconspicuous darker hairs..Osmia atriventris
3. Clypeus with uniformly short hairs..Osmia calaminthae
Clypeus with curved elongate hairs..4
4. Punctures coarse and confluent over most of scutum and scutellum..Osmia sandhouseae
Punctures of scutum and scutellum relatively fine and distinct, not confluent, at least in center of disc..Osmia pumila
Key to males
1. Teeth of T7 relatively slender, pointed, basally about one-fourth the width of the midapical emargination (Photo Fig 22 in Rightmyer et al. 2011)..Osmia calaminthae
Teeth of T7 short and dull..2
Punctures of scutum close, but distinct, the narrow interspaces shining..3
3. Median emargination of sternum 3 completely filled by the marginal fringe, the hairs converging along mid-line..Osmia atriventris
Median emargination of sternum 3 not filled by the marginal hairs, hairs relatively short..4
4. Sternum 4 with a distinct, median, impunctate furrow dividing the setose area into right and left halves..Osmia collinsiae
Sternum 4 without such a median furrow..Osmia pumila
Megachilidae: Osmia atriventris Cresson
County Records: Alachua, Jackson, Wakulla
Locations: Gainesville, San Felasco Hammock Preserve State Park
Dates: March April
Plants:
Notes: Photos of males by HGH are of specimens from Louisiana.
Female
Male
Megachilidae: Osmia calaminthae Rightmyer, Deyrup, Ascher and Griswold
County Records: Highlands
Locations: Lake Placid
Dates: March
Plants: Calamintha ashei
Notes:
Female
Megachilidae: Osmia collinsiae Robertson
County Records: Alachua
Locations: Paynes Prairie Preserve State Park
Dates: March
Plants:
Notes: All photos of females and photos of males 3, 8-16, 18, 19 by HGH are specimens from Louisiana
Female
Male
Megachilidae: Osmia pumila Cresson
County Records: None from Florida
Locations:
Dates:
Plants:
Notes: This species may be present in northern Florida. It has been collected in Georgia in Thomas County, a short distance from Leon County, Florida. Photographs by HGH are of a Louisiana specimen.
Female
Megachilidae: Osmia sandhouseae Mitchell
County Records: Alachua, Baker, Columbia, Jackson, Leon, Levy, Putnam
Locations: Gainesville, Goethe State Forest, Hawthorne, Paynes Prairie Preserve State Park, Ordway-Swisher Biological Station, San Felasco Hammock Preserve State Park, University of Florida Natural Area Teaching Laboratory
Dates: Feb - May
Plants:
Notes
Female
Male
