Occasional Papers of the Museum of Zoology 25 



en, but very firm logs were also occupied. In less decayed logs 

 larval burrows were used and elaborated. These burrows of 

 beetle larvae were very common in all dead wood on the island 

 and undoubtedly are of great aid to the ants, particularly to 

 young colonies, but to what extent it is difficult to determine 

 as it is only in the firmest wood that one can be sure of the na- 

 ture of the burrows. Frequently both the larvae and the ants 

 are present at the same time. A single nest of this species was 

 found in the earth among a pile of limestone rocks in the hard- 

 wood forest. In this one instance the nest was really in the 

 earth, and not in buried wood or in old roots. No mound had 

 "been built, and there was no sign of a nest until a few rocks 

 Avere moved. 



On several occasions members of the genus Aphaenogaster, 

 ■either A. tennesseensis or A. aquia, occupied the same stump 

 or log. In each instance one of the colonies was very small, 

 and there was no discernable relation between the two genera, 

 the close approximation of the nests being evidently due to 

 chance. The only other nest of suhaencscens found in the 

 earth besides the one mentioned above was a small one found 

 beneath a log occupied by a colony of Cantponotus pennsyl- 

 vanicus. This, too, was a case of plesiobiosis determined by 

 chance, and one colony was much smaller than the other. 



A single isolated winged female of this species, the only 

 one seen, was taken under drift debris on the east beach. In- 

 dividuals are very active and move with such an erratic and 

 jerky pace on their long slim legs that they are rather difficult 

 of capture. 



20. Camponotus herculeanus I., subsp. pennsylvanicus De- 

 Geer. — This species was first collected on September 17, when 

 a small colony was found in a badly decayed oak limb lying on 

 the ground in the hardwood forest. In addition to honey- 



