Occasional Papers of the Museum of Zoology 13,. 



on the lake face of the first row of dunes. The pines in these 

 groves are in most places of large size, and are frequently 

 mixed with oaks and other trees. The undergrowth is occa- 

 sionally quite thick, composed of choke cherry, seedlings of 

 oak and pine, and many other young trees and shrubs; in 

 other places the thin deposit of humus is covered chiefly with 

 a layer of pine needles and low herbaceous plants. This hab- 

 itat is so ill-defined and of such small extent as to make it 

 difficult to distinguish its fauna from that of the beach grass 

 or bunch grass and the oak woods which usually border it oh 

 either side; for this reason it was given little attention. Here: 

 the following species were taken : 



Parcoblatta virginica Mclauoplus mexicanus atlanis- 



Parcoblatta pennsylvanica Melanophis angiistipennis 



Mclanoplus viridipes 



Mesa phytic Habitats 



Mud-bar and sand-bar herbage habitat. Along the shores- 

 of the Galien River where it flows through the Warren Woods 

 a few small mud-bars have not yet become forested. Their 

 outer margins are usually composed of bare mud or sand ; 

 this portion is included under the shore habitat. Between the 

 bare margin and the forest, on their higher and older portions, 

 they are covered with a thick growth of herbaceous plants and 

 grasses, with occasional tree seedlings. Similar habitats occur 

 on the sand-bars and sandy shores of the small creeks cutting 

 through the dunes at Sawyer and Bridgman. About the mar- 

 gins of some of the dune ponds studied, during July and; 

 August there were exposed sandy flats from ten to twenty - 

 feet wide, which soon became covered with vegetation. Near 

 the wet, muddy margin this consisted principally of mosses 

 and low herbaceous plants, but farther back near the sur-- 

 rounding thicket of willows it was composed of taller plants,. 



