163 



" Those who answer these questions should observe the following 

 precautions : 



The answers should be concise and to the point, and should be 

 distinguished by numbers corresponding with those of the questions 

 to which they refer. 



Names and places which can be verified, and dates, should be given. 



Any information beyond the scope of the questions should be added 

 in an Appendix. 



If the reporter is in doubt as to the species of tsetse, or whether more 

 than one is present, specimens should be sent with the replies. 



He should in no case rely on native evidence. 



The longer the reporter has been resident in or near the fly-area the 

 more weight will his evidence carry. 



The answers should be written on one side of the paper only. 



1 . Are you resident in, or near, a fly-area ? In the latter case how 

 far are you distant from the nearest point of the area ? 



2. How long have you been resident in the vicinity ? 



3. Can you state approximately the size of the fly-area ? (Give a 

 sketch-map, if possible.) 



4. Has this area appreciably increased or diminished in your own 

 experience ? 



5. If so, can you state the date at which these alterations took place, 

 and the nature of the climatic conditions at the time ? 



6. Was there any appreciable increase or diminution of wild animals 

 about that time ? 



7. Does the fly-area contain Glossina morsitans only, or have you 

 reason to believe that another species of tsetse is present as well ? 



8. Does the size of the fly-area vary at different times of the year, 

 and, if so, is there a definite relation between these variations and the 

 dry and rainy seasons respectively or the prevalence of wind ? 



9. Are the limits of the fly-belt sharply denned, and, if so, what is 

 the nature of the limiting boundaries ? 



10. Are there any natural features which are specially characteristic 

 of the fly-belt and which are not to be found in the surrounding fly-free 

 areas (e.g., nature of soil, bush, herbage, presence or absence of water) ? 



11. Are there any such features which you have specially noticed to 

 be present in every fly-belt you have visited ? E.g., Does the presence 

 of fly in large numbers seem to be associated with that of sand ? 



12. Have you ever observed a tsetse-fly depositing its larva, and, if 

 so, can you describe the circumstances ? 



13. Have you observed any marked differences in the number of 

 tsetses in a particular area at different seasons ? If so, describe these 

 differences. 



14. To what do you attribute such differences ? 



15. Have you made any attempts to trap tsetses with pieces of black 

 cloth or paper worn by men or animals and smeared with bird-lime, 

 and, if so, with what success ? Have you tried any method of deterring 

 the flies from biting animals while passing through a fly-belt ? 



16. Do you know of any mammals, birds, reptiles, or predaceous or 

 parasitic insects which actually destroy tsetse-flies ? 



17. Are there, within your knowledge, any facts which lead you to 

 believe that tsetse-flies are entirely dependent for their continued 

 existence upon the blood of wild mammals ? 



18. Have you any reason to believe that tsetses are specially 

 dependent upon and associated with any particular species of mammals ? 



19. Have you ever observed tsetses feeding upon birds, lizards or 

 crocodiles ? 



