Figure 2.

Brood parasitic bees most often exhibit reduced pilosity compared with nesting bees and have lost other structures associated with nesting behaviour, such as the pollen-collecting scopa and pygidial and basitibial plates. (a) Sleeping female Ammobatoides abdominalis; (b) Stelis signata; (c) sleeping male and female Coelioxys afra; (d) female Melecta luctuosa; (e) female Epeoloides coecutiens; (f) Nomada fabriciana, lurking outside the nest of Andrena bicolor. All photos: Entomologie/Botanik, ETH Zürich/Albert Krebs.