lo University of Michigan 



Bare or sparsely vegetated dry soil habitat. Roads, paths, 

 stubble fields, trampled ground in pastures, and other similar 

 areas of exposed soil make up this habitat. In this region 

 such conditions are nearly always the result of disturbance ; 

 few natural areas of bare soil occur. In this habitat the fol- 

 lowing species were taken : 



Acrydiuni ornatum Bncoptolophus sordidus* 



Acrydium hancocki^ Dissosteira Carolina* 



Acrydium arenosum angustum Spharagemon bolli^ 



Paratettix cucullatus Spharagemon collare ivy o tiling ia- 



Tcttigidca lateralis parvipennis num* 



Chloealtis conspersaf Mclanoplus angustipennis 



Arphia xanfhoptera* Tridactylus apicalis (near water) f 



Arphia pseudonietana EUipes miniita (near water) f 



Beach grass-cottomvood habitat. Along the upper margin 

 of the beach at the foot of the dunes is a zone of variable 

 width where the sand is sparsely covered with a thin growth 

 of beach grass (Ammophila bremligulata Fernald) and where 

 the Cottonwood {Populus deltoides Marsh.) grows in scattered 

 patches and groups. In many places considerable stretches of 

 this habitat are without any tree growth. Mingled with the 

 beach grass are a few other species of grasses and xerophytic 

 plants in small numbers. In this habitat were taken the fol- 

 lowing species : 



Dissosteira Carolina Mclanoplus angustipennis* 



Spharagemon bolli Mclanoplus keeleri luridus 



Spharagemon collare ivyomingior- Mclanoplus diffcrentialisi 



num* Scudderia texensisj 



Trimerotropis maritima* Orchelimum gladiator\ 



Mclanoplus mexicanus atlanis* Gryllus assimilis 

 Mclanoplus femur-rubruvi femur- 



rubrumf 



Bunch grass habitat. Between the beach grass-cottonwood 

 zone of the upper beach and the margin of the forest on the 

 slopes of the first row of dunes is a more or less well-defined 



