aTRUCTUKE AND LIFE-HISTORY OF CRITHIDIA MEL0PHA(4[A. 215 



Nuclei and protoplasm then shrank away from the wall of 

 the rounded body — provisionally called a sporanginm (text- 

 fig. 12) — so that a space intervened. Segregation of the 

 protoplasm round the nuclei followed (text-fig. 13), and a 

 morula-like body resulted. The morula differentiated into a 

 mass of rounded spores (text-fig. 14), each ot which formed a 

 spore coat for itself. The sporangium ultimately ruptured 



Text-figures 11-15. 



14- 15 



Fungus parasitic in Melophagus ovinus. 



Text-fig. 11. — Hypha with globular head. 



Text-fig. 12. — Differentiation of nuclei within the head (sporan- 

 gium). 

 Text-fig. 13. — Spores forming in sporangium. 

 Text-fig. 14. — Mature sporangium. 

 Text-fig. 15. — Dehiscing sporangium. 



(text-fig. 15), and the numerous small spores were set free. 

 Some spores remained in the Malpighian tubes, others passed 

 out into the intestine and were voided with the faeces. 



Parasitic fungi have been previously recorded in insects, 

 for example, in the house-fly, caterpillar, mosquito. The 

 fungus mentioned by Schaudinn in Culex was probably a 

 member of the Entomophthorea3, or related thereto. The 



