NATURAL HISTORY, TORONTO REGION Anthophoridae (Solitary Bees).
Anthophora bomboides, Kirby.
Prosopis affinis, Smith.
Megachilidae (Mason Bees, Leaf-cutting Bees). Megachile brevis, Say.
Osmia distincta, Cress. Ceratinidae (Small Carpenter Bees). Ceratina dupla, Say.
Xylocopidae (Large Carpenter Bees).
Xylocopa virginica, Dru. Apidae (Honey-bees, Humble Bees)
Psithyrus ashtoni, Cress.
Bombus consimilis, Cress.
Apis mellifera, L.
Species marked (V) were taken by Mr. M. C. Van Duzee; those marked (B) are in the Provincial Museum, Toronto, collected by Dr. Brodie ; those marked (C) were contributed by Dr. A. Cosens; those marked (W) by the writer.