126 



Bulletin Wisconsin Natural History Society. [Vol. 8, No. 3. 



from the grass clump 1.2 m. (4') away, about 200 soldiers arrived 

 at the clump, another 200 were streaming across the 1.2 m. (4') of 

 lawn, and 5-600 more (estimated) including a great number of 

 callows who had not been in evidence at the first attack, were 



Street 



O-, 



RED'S NEST 



BLACK'S NEST 



i 



E 



N-(-S 

 W 



BLACK'S NEST 



RED'S NEST 



Fig. 1. Two examples of Trails and the angles subsequently cut 

 off by Reds — Formica sanguinea r.X subintegra in Forays against 

 Blacks — F. fusca X subsericea, Scale 14.8' : 1" or 1.775 m. : 1 cm. 



running at accelerated speed (my notes say top speed) out of the 

 home nest along the 4 meter route between nests. But the point 

 of this example is my note on direction, — "The line of soldiers 

 arriving at the captured nest began soon to bear away more and 

 more to the northeast," instead of east northeast as before, thus 



