H U 



FIG. 19. 



Trypanosoma gambiense. Stages in life-history passed in Glossina according to M. Robertson. 

 A, Blood-type as ingested by Glossina ; B, from intestine of fly 48 hours after ingestion ; C, from 

 intestine of fly on fifth day ; D, from intestine of fly at twentieth day ; E, from proventriculus ; 

 F, newly arrived at salivary gland ; G, crithidial type from salivary gland ; H, final type from salivary 

 gland, k, Kinetonucleus. 



