1988] 
O’Neill — Trail patterns of Formica obscuripes 
13 
Talbot, M. 1961. Mounds of the ant Formica ulkei at the Edwin S. George 
Reserve, Livingston County, Michigan. Ecology, 42 : 202-205. 
Wallis, D. 1. 1962. Aggressive behaviour in the ant, Formica fusca. Animal 
Behaviour, 10 : 267-27 4. 
Weber, N. A. 1935. The biology of the thatching ant, Formica rufa obscuripes 
Forel, in North Dakota. Ecological Monographs, 5: 165-206. 
Wilson, E. O. 1971. The Insect Societies. Belknap Press of Harvard Unversity 
Press, Cambridge. X + 548 pp. 
Yamauchi, K., K. Kinomura, and S. Miyake. 1981. Sociobiological studies of 
the polygynic ant Lasius sakagamii. I - General features of its polydomous 
system. Insectes Sociaux, 28: 279-296. 
