THE ECOLOGY OF A SHELTERED CLAY BANK; 
A STUDY IN INSECT SOCIOLOGY. 
Pum Rav. 
A. Introduction. 
B. Interrelations of animal life. 
(a) Fauna of the unit. 
(b) Pioneer life. 
(c) Renters. 
(d) Visitors. 
(e) Parasites. 
C. Relation of population to environment. 
(a) Relation to temperature. 
(b) Relation to light and sunshine. 
(c) Relation to cold, cloudiness and darkness. 
(d) Relation to rain. 
(e) Relation to plant life. 
(£) Death by violence and natural death. 
(g) Relation to soil conditions. 
D. Concluding remarks. 
