162 



A symbol in black is suggested by Dr. Simpson " to indicate the 

 presence of undetermined species of Glossina." 



The following, then, is the scheme : 



Sleeping Sickness . . . . . . (red) . 



Glossina. 



G. palpalis Group. 

 G. palpalis 



G. palpalis var. fuscipes . . 

 G. tachinoides 

 G. caliginea . . . . 



G. pallicera 

 G. austeni . . 



G. morsitans Group. 



G. morsitans . . 



G. morsitans var. submorsitans 



G. longipalpis 



G. pallidipes 



G. fusca Group. 



G. fusca . . . . 

 G. tabani/ormis 

 G. nigrofusca 

 G. fuscipleuris 



G. brevipalpis Group. 

 G. brevipalpis 

 G. longipennis 

 G. medicorum 



Undetermined species 

 Symbols for additional species. . 



(blue). 



m ( 



m ( 



A ( 



(green) 



(orange). 



( 



e ( ) 



(black). 

 O D El A A 



CHAPTER XIX. 



SPECIAL POINTS FOR CONSIDERATION IN STUDYING THE BIONOMICS 01 

 ANY SPECIES OF Glossina. SUGGESTIONS FOR FUTURE WORK. 



With a view to obtaining more accurate knowledge on the subj< 

 of Glossina morsitans the special enemy of the farmer and stock-rais 

 in many parts of Rhodesia and elsewhere the Glossina Sub-Committ( 

 of the Entomological Research Committee (now the Imperial Burea\ 

 of Entomology) drew up and disseminated in 1910 a series of carefulh 

 considered questions (168), to which it was hoped to obtain precis 

 answers from all those competent and willing to supply them. Thougl 

 formulated more than a decade ago, this detailed interrogatory, witl 

 modifications and additions suggested by facts ascertained in the 

 interim, may usefully serve as a guide for future investigations upoi 

 other species of Tsetse-flies besides G. morsitans, and in other parts < 

 Africa. It is therefore reproduced below, together with the directioi 

 by which the questions were accompanied. 



