Ecologic and Economic Relations. 
OUTLINE OF ECOLOGIC AND ECONOMIC RELATIONS. 
I. Ecouocy: 
A. Regions. 
B. Notes on a few streams and standing waters surveyed. 
a. Western Kansas. 
b. Eastern Kansas. 
1. Lake View. 
2. Haskell Pond. 
38. Griesa Pond. 
4, Smith Pond. 
5. Quarry pools. Rock Pool. Cattail Pool. 
c. Central New York. 
1. Field Station. 
2. Bool’s Backwater. 
8. Ringwood Hollow. 
C. Two pools and two seasons. 
1. A temporary pool. 
2. A permanent pool. 
D. Interrelations within the pool, a restricted environment. 
a. Haunts and Habits. 
b. Habitat Key. 
c. Relation to other organisms. 
1. Parasitism. 
2. Oviposition in plant tissues and upon animals. 
3. Relation to other organisms largely a question of feeding 
habits. 
II. ECONOMIC IMPORTANCE. 
ECOLOGY. 
REGIONS STUDIED. 
Three distinct types of country with their attending water 
bodies have been surveyed in connection with these studies on 
the water bugs: Western Kansas, Eastern Kansas, and Cen- 
tral New York. 
Western Kansas is a high, dry, level land. Its vast plains 
are little broken by the eroding forces of the water and the 
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2—Sci. Bul.—1669. 
