Occasional Papers of the Museum of Zoology 3 



3. Open woodland. This habitat is distinguished from the 

 dry forest by its scattered trees, sandy soil, scant amount of 

 litter, and a ground-cover consisting almost entirely of xero- 

 phytic grasses. 



4. Willow and dogwood thickets. The thickets are usually 

 damp and well shaded and the soil covered by a damp layer of 

 vegetable mold. 



5. Margins of pond, marsh and cranberry bog. This hab- 

 itat is of little importance as far as the ants are concerned. 

 The ground is wet and cold and there is a dense ground-cover. 



6. Grassy beach areas. The dry sandy beach back of the 

 storm beach, where it exists, is covered with a sparse growth 

 of coarse dune grasses and more or less beach debris. There 

 are no trees. 



7. Rocky beaches. These beaches, principally on the north 

 side of the island, are not an important habitat for ants. There 

 is a large amount of beach debris, logs, etc., with the rocks. 



The collection comprises twenty-one forms distributed 

 among four subfamilies and eleven genera. This seems a 

 rather surprisingly large representation for so restricted and 

 isolated an area, but Myrmica punctiventris is rare and Lasius 

 clamger is only represented by a winged specimen which may 

 have been a straggler from the mainland. Some of the forms, 

 particularly Aphaenogaster tennesseensis, one is accustomed 

 to associate with a more southern distribution. The habitat 

 distribution may be briefly summarized as follows : 

 Loiv hardzwod forest. 



Ponera pennsylvanica. Data incomplete. 



Cremastogaster cerasi. 



Stcnamma brevicorne. Peculiar to the habitat. 



Aphaenogaster aqiiia. 



