Occasional Papers of the Museum of Zoology 5 



Grassy beach. 



Poncra pennsylvanica. Data incomplete. 



Phcidole vinelandica. Peculiar to the habitat. 



Tapinoma sessile. 



Lasiiis neoniger. Peculiar to the habitat. 



Lasiiis americanus. Apparently prefers this habitat, 



Formica nitidii-entris. Data incomplete. 



Rocky beaches. 



Solenopsis luolesfa. Data incomplete. 

 Aphaenogaster aquia. 

 Aphaenogaster tennesseensis. 



As would be expected, only a few of the species are con- 

 fined to a single one of the listed habitats, and probably con- 

 tinued study would still further reduce the number, for there 

 is an overlapping- and interdigitation of the habitats, and cer- 

 tain conditions may be common to several of them. But it may 

 be seen in the notes under each species in the list which fol- 

 lows, that, except in the case of Lasiiis americanus and Form- 

 ica suhsericea, the association of the species with certain gen- 

 eral conditions is close, and that even these two notoriously 

 generally distributed species show habitat preferences. Lasius 

 (Acanthomyops) claviger has been omitted from the preced- 

 ing list, as the only record was an isolated aleate female. 



Acknoivledgements. — I wish here to acknowledge my in- 

 debtedness to Professor W. IM. Wheeler for the identification 

 of the collection and to Professor A. S. Pearse under whose 

 direction the laboratory study was made. I also take pleasure 

 in expressing my appreciation of the hospitality and assistance 

 of the lighthouse keeper, Capt. C. C. MacDonald, and the as- 

 sistant keeper, ]\Ir. J. vSingleton, during the field work. 



