Two books are available from IBRA which provide colour plates:
1) Hodges, D (1984) The pollen loads of the honey bee
2) Kirk, W (1994) A colour guide to pollen loads of the honey bee
The books can be obtained directly from IBRA, or from IBRA country
representatives and booksellers.
You can email IBRA at - [log in to unmask] They have credit card
facilities.