Bui. 416, U. S. Dept. of Agriculture. 



Plate VIII. 





i^^^'' 



Diagram Illustrating Complex Relationship of Red Spider to Its Zoological 



Environment. 



Nine groups of predators embracing 31 species are seen to attack the red spider, and in turn 7 of 

 these predator groups areattaeked by a total of 75 species of parasites and predators. (Original. ) 



