300 



HANDBOOK OF PROTOZOOLOGY 



Genus Ophryocystis Schneider. Parasites of the Malpighian 

 tubules of Coleoptera. Schizogony by binary fission or multiple 

 division. The schizonts are conical and are attached to the sur- 

 face of the host cells by pseudopodial processes. From a pair 

 of trophozoites, a single spore is produced, in which eight sporo- 

 zoites develop. 



Fig. 126 Development o{ Schizocystis gregarinoides. X 1000 (After Leger) 



a. Germinating spore. 



b. Growth of schizonts. 



c. Schizogony. 



d. Two gametocytes and their association. 



e. Stages in gamete formation. 



f. Gametogony. 



g. Cyst containing zygotes, each of which develops into a spore (a). 



