FUNGI AND BACTERIA 



51 



more species. Thus, the g\T3sy caterpillar occasionally dies off in 

 large numbers from the effect of a disease due to a species of such 



Fig. 55. — Tent Caterpillars killed by a disease caused by a species of 

 bacteria. Original. 



organism. The same or a similar disease attacks also the common 

 tent caterpillar. 



