An identification guide to the genera of Megachilidae of North America. Includes illustrations, identification tips, distributional facts for separating out the genera

1. Chunky Bees that Carry Pollen Under their Abdomens: A Guide to their identification in Eastern North America

6. 2 Species, small, fast, likes legumes and dry sites

8. Some common introduced species 4 Species

10. Uncommon to rare 3 Species

12. Uncommon, garden exception

14. Uncommon, parasites of Hoplitis, Osmia, Heriades, Ashmeadiella 12 Species

16. Uncommon, southern, 5 species

18. Relatively common 8 species

20. Common, spring, hole-nester, 28 species

22. Rare Small 2 species

24. Tiny, elongate, 3 species, 2 introduced

26. Tiny, uncommon to locally common, 3 species

28. Common in all open environments 40 species

30. Parasite of Megachile, pointed rear, arolia, no scopa 24 Species

32. Rare, 2 cactus specialists, 1 introduced