This family includes what Mitchell referred to as the families Anthophoridae and Apidae. Current phylogenetics used here are from Michener (2000).
1. Scopa of female, when present, forming a corbicula on posterior tibia; inner apical margin of posterior tibia of nonparasitic females (except in queens of Apini) with row of stiff bristles (the rastellum); pygidial and basitibial plates absent; eyes hairy or jugal lobe of hind wing absent...2
Scopa of female not forming a tibial corbicula, and scopa sometimes absent; inner apical margins of posterior tibia bare or hairy, without comb; pygidial and basitibial plates frequently present; eyes very rarely hairy and jugal lobe of hind wing almost always present...3
2. Eye hairy; jugal lobe of hind wing present although notch delimiting it shallow; hind tibial spurs absent; arolia present..Apinae, Apini
Eye bare; jugal lobe of hind wing absent; hind tibial spurs present; arolia absent...Apinae, Bombini
3. Stigma absent; middle and hind basitarsi usually longer than tibiae; clypeus nearly flat, lower lateral areas not curved backward...Xylocopinae, Xylocopini
Stigma present, although sometimes (e.g., Anthophora, Centris) very small; middle and hind basitarsi usually shorter than tibiae; clypeus variable but usually more convex with lower lateral parts bent backward...4
4. Pygidial plate absent, sometimes represented by spine in pygidial fimbria of female; scopa present; epistomal suture between lateral extremity and subantennal suture usually bent mesad such that upper part of clypeus is almost parallel-sided; clypeus not or weakly protuberant...Xylocopinae, Ceratinini
Pygidial plate present in females and most males, or if absent in females, then scopa also absent; epistomal suture not or rarely bent mesad such that upper part of clypeus is nearly parallel-sided; clypeus commonly strongly protuberant, lower lateral parts bent strongly posteriorly...5
5. Second abscissa of vein M+Cu of hind wing shorter than cu-v; scopa absent (posterior angle of mandible beneath middle of lower end of eye; claws of at least hind leg usually with inner ramus a broad lobe...Apinae, Ericrocidini
Second abscissa of vein M+Cu of hind wing as long as to much longer than cu-v, but if equal, then hairy bees with scopa...6
6. Jugal wing of hind wing small, less than one-fouth as long as vannal lobe; scopae absent ...7
Jugal wing of hind wing at least one-fouth as long as vannal lobe; scopae usually present ...8
7. Front coxae quadrate, trochanters arising from outer distal angles of coxae, trochanters thus far apart; axilla nearly always produced to acute angle or spine; S6 of female largely invaginated, disc reduced and lateral distal portions produced to form a pair of long, dentate or spinose processes...Nomadinae, Epeolini
Front coxae somewhat triangular, trochanters arising close to one another from apices of coxae (except lateral to apical coxal spines if spine present); axilla usually rounded; S6 of female not much invaginated, disc not greatly reduced, spinose processes, if present, short or mere lobes...Nomadinae, Nomadini
8. Paraglossa as long as first two segments of labial palpus taken together; jugal lobe of hind wing about half as long vannal lobe or sometimes more; antena of males commonly elongate..Apinae, Eucerini
Paraglossa much shorter than first segment of labial palpus; jugal lobe of hind wing usually less than half as long as vannal lobe; antennae of males usually not elongate...9
9. Stigma small, usually shorter than prestigma, parallel sided, vein r arising near its apex; distal parts of wing strongly papillate, basal parts usually with large bare areas...10
Stigma larger, longer than prestigma, tapering beyond vein r, which arises near middle of stigma; wings usually pubescent throughout and only weakly papillate apically..Apinae, Emphorini
10. First submarginal cell larger than second, posterior margin longer than that of second; scopal hairs of female largely simple, sometimes plumose along upper margin of tibia..Apinae, Anthophorini
First submarginal cell usually smaller than second, posterior margin shorter than that of second; scopal hairs of female mostly plumose, often intermixed with simple hairs or with projecting simple apices...Apinae, Centridini
Systematic Overview of the Apidae in Florida
Subfamily Xylocopinae
Tribe Ceratinini
Genus Ceratina
Subgenus Ceratinula
Zadontomerus
Tribe Xylocopini
Genus Xylocopa
Subgenus Schonherria
Xylocopoides
Subfamily Nomadinae
Tribe Nomadini
Genus Nomada
Tribe Epeolini
Genus Triepeolus
Genus Epeolus
Subfamily Apinae
Tribe Emphorini
Genus Melitoma
Genus Ptilothrix
Tribe Eucerini
Genus Eucera
Subgenus Synhalonia
Genus Florilegus
Genus Melissodes
Subgenus Apomelissodes
Genus Svastra
Subgenus Epimelissodes
Genus Xenoglossa
Subgenus Eoxenoglossa
Tribe Anthophorini
Genus Anthophora
Subgenus Melea
Genus Habropoda
Tribe Centridini
Genus Centris
Subgenus Centris
Paracentris
Tribe Erocrocidini
Genus Erocrocis
Tribe Bombini
Genus Bombus
Subgenus Bombias
Bombus
Megabombus
Pyrobombus
Psithyrus
Tribe Apini
Genus Apis