1910.] The Natural Food of Glossina palpalis. 



493 



tlie Lake-shore. It was scattered with light undergrowth and fringed 

 by ambatch trees, on which flocks of divers and cormorants sat with 

 outstretched wings drying in the sun. A barrier of bare rocks and boulders 

 projected on one side, and a small school of hippopotami was generally to be 

 seen floating near and basking in the sun. Many small crocodiles were 

 disturbed from the undergrowth as the point was explored, and various kinds 

 of small land birds frequented the reeds and shrubs. The soil was sandy 

 loam, and shaded by the light foliage. Glossina palpalis swarmed. The 

 place has been described at some length, so that the exact conditions may 

 be realised. 



Subsequent to this experiment, the daily catch of Lake-shore flies was 

 obtained from this place, and incidentally it may be added that the flies 

 caught here were regularly found to be infective to monkeys. 



Table II. — The Xaked-Eye Appearances of the Contents of the Alimentary 

 Canal of 183 Tsetse Flies, with their Sex, and the Presence or Absence 

 of a Larva. 



No. 



Sex. 



Larra. 



Red 

 blood. 



Black 

 blood. 



No. 



Sex. 



Larva. 



Red 

 blood. 



Black 

 blood. 



1 



<? 









34 



(? 









2 



S 









35 







+ 





Q 



(? 









36 



9 







+ 



4 



* 



+ 







37 



? 



+ 







5 



? 









38 



<? 





+ 





6 



<? 









39 









+ 



7 



<? 









40 



? 







+ 



8 



? 



+ 







41 









+ 



9 



<? 









42 







+ 





10 



? 









43 



S 







+ 



11 



? 









44 



9 



+ 







12 



? 









45 



9 







+ 



13 



? 









46 



S 







+ 



14 











47 



9 







+ 



15 











48 



9 







+ 



16 



s 









49 









+ 



17 



? 







+ 



50 



3 









18 



? 







+ 



51 



<? 







+ 



19 



(? 





+ 





52 



9 



+ 







20 



? 







+ 



53 



3 









21 



(? 





+ 





54 



9 





+ 



+ 



22 



<? 







+ 



55 



3 









23 



5 







+ 



56 



9 







+ 



24 



? 







+ 



57 



3 









25 



(? 





+ 





58 



9 



+ 







26 



3 







+ 



59 



9 







+ 



27 



3 





+ 





60 



9 







+ 



28 



? 



+ 





+ 



61 



3 







+ 



29 



<? 







+ 



62 



3 







+ 



30 



S 









63 



3 







+ 



31 



2 







+ 



64 



9 









32 





+ 







65 



3 









! 33 



? 







+ 



66 



3 







+ 



