248 



GLOSSINA 



[CH. 



Synopsis of species of Glossina, after Austen'^. 



Tarsi of hind-legs entirely | Glossina palpalis Group (I), also G. morsitans 

 dark brown or black i var. paradox a (vide infra). 



Species of small size, 

 length not exceeding 

 10-5 mm., usually 

 much less ; wing ex- 

 pansion not greater 

 than22'5mm. Upper 

 surface of abdomen 

 distinctly banded, 

 with conspicuous dark 

 brown transverse 



marks on a pale 

 ground colour. 



Only the two 

 last joints of 

 hind tarsi are 

 dark-coloured, 

 thus forming 

 a conspicuous 

 contrast with 

 the remaining 

 joints which 

 are pale. 



Glossina 

 morsitans 

 Group {II). 



Species of large size, "\ Wings fairly dark. 



exceeding 105 mm. 

 Wing expansion at 

 least 25 mm. 

 Upper surface of ab- j 

 domen not marked 

 with distinct bands as ] 

 '1^ in the previous group. J 



Palpi long and 

 slender (except in 

 tabaniformis). 



Wings pale, 

 short. 



Palpi 



Glossina 



fusca 



Group {III). 



Glossina 

 brevipalpis 

 Group {IV) 



I. Glossina palpalis group. 



Dorsum of abdomen ochraceous-buff or buff ; third and following segments 

 exhibiting sharply defined, dark brown or clove-brown interrupted transverse 

 bands. Length not more than 8 mm. . . . . tachinoides, Westw. (p. 253). 



Closely resembling tachinoides, but distinguished by its bright ochraceous 

 colour and relatively narrow head. Length of 9 (only specimen known) 7 mm. 



austeni, Newstead. 



Third joint of antennae pale, clothed v/ith long and fine hairs, forming a 

 conspicuous fringe on front and hind margins. Length 8 to 9 mm. 



pallicera, Bigot. 



Dorsal surface of abdomen dark sepia-brown ; median paler area on 

 second segment broad and more or less quadrate or irregular in outline. 

 Hypopygium of male buff or ochraceous-buff . . . . caliginea, Austen. 



Dorsal surface of abdomen blackish-brown ; median pale area triangular 

 In outline. Hypopygium of male grey. Length of male always exceeding 

 8'5 mm. . . palpalis, Rob. Desv. (p. 256). 



Handbook of the Tsetse-Flies, 1911. 



