The observations recorded here were made during the course of a series of studies on the activities of Formica rufa melanotica Emery. In this species all the workers are deeply infuscated with black: the smallest workers are entirely black; the largest workers are very dark with clear red head; between these two is a series of intermediate forms with dark head. It has already been established that most of the workers engaged in moving a colony to a new nest were red-headed major workers (Sallee and King, 1947), and observations indicated that most of the workers attending aphids were black-headed minors. This brought up the question of the degree of differentiation and relative numbers of workers in a colony of this species.
Proceedings of the Iowa Academy of Science
©1950 Iowa Academy of Science, Inc.
King, Robert L. and Walters, Francis
"Population of a Colony of Formica Rufa Melanotica Emery,"
Proceedings of the Iowa Academy of Science, 57(1), 469-473.
Available at: https://scholarworks.uni.edu/pias/vol57/iss1/68