Ectemnius rufifemur is a species of square-headed wasp in the family Crabronidae. It is found in Central America and North America.

Subspecies These two subspecies belong to the species Ectemnius rufifemur: Ectemnius rufifemur orizabinus Leclercq, 1968 Ectemnius rufifemur rufifemur (Packard, 1866)

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