DISPERSAL BY EXPULSIVE MECHANISMS. 



825 



trates into the body-cavity, and there it divides up repeatedly, forming numerous 

 cells throughout the body. The infected fly, sickening under the injurious influence 

 of the Fungus and almost at the point of death, seeks for some quiet spot in which 

 to die. It frequently chooses for its last resting-place a window pane, in which 

 case it is possible to thoroughly investigate the further development of the Fungus. 

 After the death of the fly the round cells of the Empusa, hitherto hidden in the 

 body-cavity, grow out into long tubes which pierce the skin of the fly's corpse and 

 appear as short club-shaped structures on the surface. A single egg-shaped conidium 



oft. Sporangium of 



Fig. 456.-Distribution of spores by expulsive mechanisms. 



the sporangium 



no ^inarl and B Tne same m 



are thrown off. 



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