1988] 
O’Neill — Trail patterns of Formica obscuripes 5 
Figure 1 . A map of the study site showing ant trail patterns and the position of nests and large patches of vegetation, such as 
Canada thistle (circumscribed by dotted lines) and chokecherry (shaded CH), harboring honeydew producing Homoptera. 
Censused nests are numbered and the trail systems connecting nests within groups are labelled A through E. Dashed lined 
segments of trails are those that disappeared early in the season before censusing of marked workers began. 
