Yellow Fever and Other Diseases i ) 7 



surprise if some should prove to be pathogenic for 

 man. 



Christophers and Stephens have noted the occur- 

 rence of sporozoa in the ova of certain species of 

 Anopheles, also the presence of the gregarines in the 



Fig. 24. — Pupa of Stegomyia calopus (greatly enlarged). 



gut of mosquito larvae. Referring to the parasites 

 found by American authors in the diverticula of S. 

 calopus these observers remark that they are quite 

 common in other species of the genus, and regard 

 them as belonging to the genus Noscma. 



Grassi describes sporozoa and other similar objects 

 in the body cavity of mosquitoes. Johnson, in Mas- 



