General features:
- Long-tongue bees
- Rectangular, longer than broad and broadly articulating with clypeus
- Lack of basitibial plate (except in Lithurgus)
- Forewing with 2 submarginal cells
- Metasomal sterna with scopa (except in the parasitic forms)
Habitus
Antenna
Head
Head
Mouth
Leg
Metasoma
Wing venation
