182 WET GROUND COMMUNITIES 
b 138 
Fic. 138.—Prairie-like stage of a pond margin. 
Habitat of Cicindela tranquebarica in the pine 
zone of the ridges at the south end of Lake 
Michigan. The dark portion in the foreground 
is the shadow of a tree. At the left is the 
cattail zone of the depression; between a and 
b, the sedge zone; between 0 and c the zone of 
high-depression plants. The white blossoms 
here are those of Parnassia caroliniana; their 
distribution, September, 1906, corresponds ap- 
proximately to the distribution of the larvae of 
C. tranquebarica, which arose from eggs laid in 
May and June, 1905. The portion to the right 
and above c represents the higher portion of the 
ridge and the habitat of C. scutellaris. Reprinted 
from the Journal of Morphology. 
Fic. 139.—The upper part of the burrow of 
C. tranquebarica, pupal cell shown by dotted 
line; 3 natural size. Reprinted from the Journal 
139 of Morphology. 
