Vlll 



LIST OF FIGURES IN THE TEXT 



FIG. PAGE 



1. A Tsetse-fly, Glossina longipennis, Corti (Somaliland) , in 



resting attitude, showing the position of the wings. 

 (Partly diagrammatic, x 3. After Austen. Repro- 

 duced by permission of the Trustees of the British 

 Museum) . . . . . . . . ' . . . . . . 4 



2. Stomoxys calcitrans, L., in resting attitude, showing the 



position of the wings. (Partly diagrammatic. X 3. 

 After Austen. Reproduced by permission of the 

 Trustees of the British Museum) . . . . . . . . 5 



3. Haematopota vittata, Lw. (Tropical Africa), in resting 



attitude, showing the position of the wings, the mark- 

 ings on which are omitted. (Partly diagrammatic, x 3. 

 After Austen. Reproduced by permission of the 

 Trustees of the British Museum) . . . . . . . . 5 



4. Pupae (puparia) of six species of Tsetse-flies, dorsal 



aspect, natural size. A, G. brevipalpis, Newst. ; 



B, G. fusca, Walk, (cephalic (lower) extremity missing) ; 



C, G. morsitans, Westw. ; D, G. pallidipes, Austen ; 

 E, G. austeni, Newst. ; F, G. palpalis, Rob.-Desv. 

 (From photographs of actual specimens). After 

 Austen. Reproduced by permission of the Trustees of 



the British Museum 29 



5. Pupae (puparia) of six species of Tsetse-flies, dorsal 



aspect, x 6 : the same specimens as those represented 

 in Fig. 4, similarly lettered. After Austen. Repro- 

 duced by permission of the Trustees of the British 

 Museum . . . . . . . . . . . . 30 



6. A Tsetse-fly (Glossina morsitans, Westw., $), before 



feeding (x6). After Austen. Reproduced by per- 

 mission of the Trustees of the British Museum 81 



7. A Tsetse-fly (Glossina morsitans, Westw., $), after 



feeding, showing abdomen distended with blood ( X 6) . 

 From a drawing from life by Lady Bruce, R.R.C. 

 After Austen. Reproduced by permission of the 

 Trustees of the British Museum . . . . . . 81 



8. Apparatus for feeding Tsetse-flies with extravasated 



blood, devised by Drs. Rodhain, Pons, Van den 

 Branden and Bequaert. (Mission Scientifique dn 

 Katanga. 116) 



A. Apparatus complete (half natural size). B. Lower 

 part of apparatus (twice natural size), showing piece of 

 skin stretched over a rubber ring (ft), which is fitted 

 on to the lower end of a short glass tube ; a, rubber 

 joint in upper end of short tube, carrying a 

 graduated pipette . . . . . . . . . . . 98 



