Subfamily Megachilinae

Tribe Osmiini (14 taxa)

This tribe is best represented in western North America, in temperate and desert environments. It has 4 genera present in Florida, with nearly all species being winter or early spring species.

Key to Genera(From Michener 2000)

    1. Propodeum with narrow horizontal basal zone, set off from declivous posterior surface by a carina, and divided by carina into a series of large pits; anterior surface of T1 broadly concave and delimited by strong carina; lines delimiting propodeal triangle absent or feeble...Heriades

    Propodeum without such a horizontal basal zone (but if pits and a zone set off by a carina are evident, then zone is usually sloping, and anterior surface of T1 is neither broadly concave nor delimited by strong carina); lines delimiting propodeal triangle distinct, at least as sharp changes in sculpturing...2

    2. Parapsidal lines punctiform or at most 3 times as long as wide; body usually metallic.. Osmia

    Parapsidal lines linear; body rarely metallic although sometimes strongly so...3

    3. S2 and S3 of male similar to one another; S5 and S6 of male hidden, largely membranous, only transverse apical marginal areas and lateral margins somewhat sclerotized, these sterna with large, basal, minutely hairy areas invaginated anteriorly into metasoma; distance from first submarginal crossvein to first recurrent usually twice distance from second recurrent vein to second submarginal crossvein; anterior surface of mesepisternum in front of omaulus smooth, shining, lower part usually sharply divided at omaulus from outer surface, lower part of omaulus carinate; male T6 with 4 strong teeth.. Ashmeadiella

    S2 and S3 of male commonly quite different from one another; S5 or S6 of male, or both, usually exposed, broadly sclerotized, without large, anterior hairy areas; distance from first submarginal crossvein to first recurrent almost always less than twice distance from second recurrent vein to second submarginal crossvein; anterior surface of mesepisternum in front of omaulus usually at least with a few punctures near omaulus, which is not carinate; male T6 not 4-toothed.. Hoplitis