3 I2 



T. GAMBIENSE 



[CH. 



13 



12 



Fig. 75. (1-19). Trypanosoma gambiense. x about 2000 diameters. 



(After Muriel Robertson.) 



1-4. Trypanosomes from the blood of a monkey. 

 5-6. Division of blood- types. 

 7-8. Trypanosomes in the middle intestine of Glossina, 36-48 hours 



after ingestion. 



9-10. Slender proventricular types, final form of the gut development. 

 11-12. Specimens newly arrived in the salivary gland. 

 13-15. Typical salivary gland form, shewing the crithidial condition. 

 16-17. Division of salivary gland forms. 



18-19. Final trypanosome types in the salivary glands, probably the in- 

 fecting form. 



