CRITHIDIA HYALOMM^ 



359 



Fig. 167. — Grithidia liyalommce from Body Cavity of Hyalomma wgyptium of tii] 

 Sudan (x 2,000). (After O'Farrell, 1913.) 



1-2. Leishmania forms in hsemocoele fluid, (described a.s pre -flagellate forms). 

 3. Plasmodia! phase from hsemocoele fluid. 

 4-10. Development of flagella and transformafon into crithidia forms. 

 11-12. Fully-formed crithidia. 

 13-15. Retrogression form in haemoccele fluid (described as post-flagellate form). 



16. Ovarian form (described as post-flagellate stage). 



17. Plasmodia! form in ovary. 18. Form in salivary gland 

 19. Stages in ovarian cell. 



