ANIMALS OF THE DUNES 



149 



travels still farther back from the lake into the oak-hickory 

 association he encounters the green tiger (C. sexguttata) , though 

 it is much more common still farther back in the hickory -maple 

 and maple-beech forests. Yet other species are confined to the 

 borders of the interdunal ponds (C. tranqueharica) to the margins 

 of sphagnum bogs (C. ancocisconensis) and to the shores of small 

 lakes (C. re panda). It is remarkable that species so closely 

 related should occupy such closely adjacent areas and each keep 



Fig. 145. — Species of tiger beetles. At left, Cicitidela formosa generosa. 

 a, Wing cover of C. lepida; b, C. cuprascens; c, C. hirticollis; d, C. scutellaris lecontei; 

 e, C. sexguttata; f, C. repanda; g, C. anco'cisconensis; h, C. limbalis. All X2. 



quite strictly to its own narrow belt. Yet such is found to be 

 the case the world over; closely related species are seldom found 

 living together, but if in the same region each occupies its own 

 restricted area. 



These tiger beetles are all predatory, feeding on flies and 

 other insects which they often capture on the wing. They occur 

 usually on bare, sunny spots. Thus, the green tiger of the maple- 

 beech forest is found on the open paths. They are wary animals, 

 rising in quick flight as you approach and flying in straight lines 

 some distance ahead of you when they turn as they alight to 



