Colonies of Formica rufa melanotica Emery construct the most conspicuous ant nests in the region of the Iowa Lakeside Laboratory; 85 nests of this species have been found in 40 acres of prairie. These nests are often two feet in diameter: a thatched mound composed of short lengths of grass, twigs and other plant debris; well-developed mounds are often 18 inches high with an outer rampart of earth upon which the plant material forms a thatch. More numerous than these nests of melanotica are the smaller earthen mounds of the prairie ant, Formica cinerea neocinerea Wheeler: 72 nests of the latter species have been found in an area of about 2½ acres.
Proceedings of the Iowa Academy of Science
©1947 Iowa Academy of Science, Inc.
Sallee, R. M. and King, R. L.
"An Ant Colony which Moved over Two Hundred Feet,"
Proceedings of the Iowa Academy of Science, 54(1), 349-352.
Available at: https://scholarworks.uni.edu/pias/vol54/iss1/55