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Bulletin American Museum of Natural History. [Vol. XXII, 



from their formicary, the ants were guarding a few large black mem- 

 bracids (Vanduzea arcuata Say). Late in the summer, in a very 

 different locality, near Lakehurst, New Jersey, I found a number of 

 integra workers attending a herd of large lead-colored aphides on the 

 leaves of some small oaks (Quercus ohtusiloha) around the roots of 

 which they had constructed tents exactly like those seen at Cole- 

 brook. The ants had evidently been keeping aphides or membracids 

 in these tents earlier in the season. 



Fig, 3. Nest of Lasius niger L. var. antericanus Emery under stone. The stone has been removed, 

 showing a prostrate plant-stem along which the ants have constructed an irregular gallery. An aphis tent 

 of vegetable detritus is shown on the left-hand side of the figure where the plant-stem rose from under the 

 stone. 



F. rufa and its subspecies integra may be regarded as typical of 

 a large number of species and genera of ants and show very clearly the 

 intimate connection between the construction of tents and that of 

 the nest proper. The tents are, in fact, merely detached portions of 

 the nest set aside for a particular purpose. Ants are apt to be re- 

 garded as mere excavators in soil or wood and their mounds as mere 

 accumulations of the excavated materials. While such a view truth- 

 fully represents the conditions in certain species, it is, nevertheless, 



