Explore Books on
psithyrus

The humble-bee

By Frederick William Lambert Sladen

Bumblebees

By D. V. Alford

Bumble bees and cuckoo bumble bees of California (Hymenoptera, Apidae)

By Robbin W. Thorp

Bumblebee distribution maps scheme

By D. V. Alford

Atlas of the bumblebees of the British Isles

By