1912.] Antelope and their Relation to Trypanosomiasis. 167 



infection of gut, proventriculus and salivary glands, the proboscis being 

 negative. This latter fact would point to the exclusion of T. pccaudi and 

 T. dimorphon from the differential diagnosis. A second experiment, in which 

 51 laboratory-bred flies were used, proved negative. 



An experiment comprising 79 laboratory-bred G. palpalis fed upon 

 Monkey 511 gave one infected fly on the 42nd day. The gut only contained 

 trypanosomes. The clean monkey upon which these flies were fed ran away 

 without having ever shown trypanosomes. 



Morphology. — Dimorphism marked, the extremes 35 /j. and 17/4. The long 

 or short type may predominate from day to day, but intermediate forms are 

 always present. Forms over 31 /x in length are very uncommon ; the longest 

 examples were met with in Experiment 504, a monkey infected from 

 Experiment 401, through laboratory -bred flies. 



Table VII on opposite page shows the distribution of length in 10 experi- 

 mental animals. 



The Protoplasm is devoid of granules in all preparations examined from 

 goats and monkeys. In both the rats examined granules were present in 

 numbers both behind and in front of the nucleus. 



Table VIII. — Animal Reactions. 



Expt. 



Monkey... 



Eat," whit* 



Goat 



Dog 



Calf 



Situtunga 402-3 

 509-10 



PI 



ies from 401 

 Goat 512 

 Calf 478 

 Goat 579 

 Monkev 401 



Eat 477 

 Situtunga 509-10 

 Monkey 401 



Goat 512 

 Monkey 401 



i good health. 

 . good health 

 . good health. 

 l good health. 



Alive after 124 days : 

 able emaciation ; nc 

 Alive after 82 days ; i 



Alive after 75 days ; i 



Alive after 70 days ; i 



Alive after 54 days ; i 



Alive after 42 days ; i 



Alive- after 42 dav? ; slight emaciation • 

 lively. 



Alive after 42 days; apparently in ex- 

 j cellent health. 



i Alive, and apparently in good health, 

 after 82 days. 

 Never showed trypanosomes, proved by 

 sub-inoculation into monkey. Alive 

 after 90 days ; well. 

 Alive after 42 days ; in good condition. 

 1 In very poor condition at time of inocu- 

 i lation and during the experiment. 

 | Proved by sub-inoculation iuto monkey. 



| 51 days after inoculation. INo obvious 

 symptoms after 99 days. 



