HAEMOSPORIDIA 



443 



Fig. 202. The life-cycle of Babesia bigemina (Dennis), a-f, division 

 in erythrocytes of cattle; g, h, gametocytes; i, isogametes; j, fertiliza- 

 tion; k, zygote; 1, ookinete penetrating through the gut wall; m, 

 ookinete in host egg, n-p, sporoblast-formation; q, sporokinetes in a 

 large embryonic cell; r, sporozoites in salivary gland. 



a considerable amount of damage to the cattle industry in the 

 southern United States to which region the distribution of the 

 tick is limited. 



B. hovis Starcovici (Fig. 203, e-h). In European cattle; amoe- 

 boid form usually rounded, though sometimes stretched; 1-1. 5/i 



