Fig. 104. — Life-cycle of Haemoproteus columhse Celli & San Felice. The 

 stages above the dotted line occur in the pigeon, those 

 below in the fly. A^-C-^, growth of female gametocyte 

 in red blood-corpuscle ; A^—G^, growth of male gameto- 

 cyte ; D^, E-^, rounding off of female gametocyte and 

 escape from cell ; D,^, E^, rounding off of male gameto- 

 cyte and formation of male gametes ; F, fertiUzation ; 

 6—L, formation of ookinete, which finally makes its 

 way through the stomach-wall of Lynchia maura ; 

 M, young oocyst on stomach-wall of Lynchia maura ; 

 N, mature oocyst filled with sporozoites, which eventually 

 enter the salivary glands of the fly and are thence injected 

 into the pigeon ; O, sporozoite entering an endothelial cell 

 of a blood-vessel of the pigeon ; P, growth of the sporozoite 

 in a mononuclear cell ; Q, primary schizogony into a niunber 

 of uninucleate bodies ; R—V, each uninucleate body increases 

 in size and becomes multinucleate ; W, segmentation into 

 numerous minute young gametocytes which enter red 

 blood-corpuscles. (From Wenyon, after Aragao and Adie.) 



