CONCERNING GLOSSINA MORSITANS. 151 



smaller mammals, e. a. monkeys, rodents, etc.^ should be included in the 

 enquir}-, for if they also act as reservoirs the destruction or removal of big- 

 game would not materially lessen the danger to domestic animals. 



CuHures to he made from hlood. — An attempt should be made to cultivate- 

 trypanosomes from the blood of wild animals on artificial media. In this way 

 the presence of parasites which are very scarce in the blood can be demon^ 

 strated, and one may get information, or at least a hint, as to the species to- 

 which they belong. 



The probability that domestic animals belonging to a breed which has long-^ 

 been subject to the attacks of tsetse may have become relatively immune to* 

 the trypanosomes inoculated by the fly, though harbouring the parasites in 

 their blood, must always be remembered and a careful watch kept for such 

 cases. Animals of this kind might obviously serve as foci for infection of 

 non-immune stock. 



For the purpose of collecting evidence with regard to the habits of Glossina 

 morsitans, the Colonial Oflice have kindly made arrangements for the printing 

 and distribution of the following interrogatory. It is earnestly to be hoped 

 that those into whose hands these questions may fall will endeavour to further 

 this important enquiry to the best of their ability. 



