LIST OF FIGURES IN THE TEXT. 



FIG. PAOK 



1. A Tsetse-fly, Glossiiui longipennis, Corti (Somaliland), in I'csting 



attitude, showing the position of the wings. (Partly dia- 

 grammatic. X 4) . . . . . . . .2 



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



of the wings. (Partly diagrammatic, x 4) . . .3 



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



showing the position of the wings. (Partly diagrammatic. 



X 4) 3 



4. Pupa of Glossina pallidipes, Austen, dorsal aspect ( x 12) : a, pos- 



terior extremity, showing pit and (st) right larval stigma 

 (x 24); b, anterior extremity, showing longitudinal seam, 

 which opens to permit the escape of the fly (x 8) . . 5 



5. Pupae of six species of Tsetse-flies, dorsal aspect, natural size. — 



A, G. brevipalpis, Newst. ; B, G. fiisca, Walk, (cephalic (lower) 

 extremity missing) ; C, G. inorsitans, Westw. ; D, G. pallidipes, 

 Austen ; E, G. tachifioides, Westw. ; F, G. palpalis, Rob.- 

 Desv. (From photographs of actual specimens) ... 5 



6. Pupae of six species of Tsetse-flies, dorsal aspect ( X 6) : the same 



specimens as those represented in Fig. 5. — A, G. brevipalpis, 

 Newst. ; B, G. fiisca, Walk, (cephalic (lower) extremity 

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

 E, G. toc/iinoirfes, Westw. ; P, G.^aZpaZis, Rob.-Desv. (From 

 enlargements of photographs of actual specimens) . . 7 



7. Diagram showing nomenclature of external characters of Glossina, 



used in description ........ 11 



8. Left antenna of Glossina pallidipes, Austen, S , from the inner 



side ( X 60) ; the very minute proximal joint of the arista is 

 not visible in this view ; pi, aperture of sense-organ on third 

 joint of antenna ........ 12 



9. Diagram of thoracic chaetotaxy of Glossina, dorsal aspect ( x 10) 16 



10. Diagram of thoracic chaetotaxy of Glossina, pleural aspect ( x 10) 17 



11. Antenna, oi Glossina caliginea, Ansten {x 30) . . . .31 



12. Antenna of Glossina palpalis, Rob.-Desv. ( x 30) . . .31 



13. Antenna of Glossina pallicera. Bigot. ( x 30) . . . .30 



14. Distal portion of abdomen of Glossina morsitans, Westw., <^ 



(ventral aspect), showing [h] hypopygium and the hectors 

 above it (x 15) 50 



