The Fleas of Canada, Alaska, and GreenlandBy George P. Holland
Entomological Society of Canada, 1985
A comprehensive monograph of the group; contains technical keys to families, subfamilies, genera, and species in the region, as well as species descriptions, checklists, host data, and distribution maps. Not for beginners!
Holland, G.P. 1985. The fleas of Canada, Alaska, and Greenland (Siphonaptera). Mem. Ent. Soc. Can. 130:1-631
Available for viewing ($15 pay per view for nonmembers) at NRC Research Press: