400 



humeral callus on each side being small ovoid or nearly 

 circular ; femora pale, the dark blotches much reduced 

 (Austen). 



3. Gl. maculata. Resembles a dark Gl. palpalis, 

 but differs in having the posterior surface of the head, 

 thorax, pleurae, and femora, mottled with conspicuous 

 black spots. 



4. Gl. pallicera. Third joint of antenna orange- 

 buff. Front in both sexes narrower than in Gl. palpalis. 

 In $ the arista is stouter and longer than that in GL 

 palpalis. 



(AA) Hind tarsi not entirely dark. 



(a) Small species, length is rarely ten-and-a-half 

 mm. 



(/3) Last two joints of front and middle tarsi 

 have sharply defined dark-brown tips. 



Fig. 127. Glossina, shewing scissors position of Wings when 

 at rest, X 2. (After Austen) 



5. Gl. morsitans. (i) Smaller than G. longi- 

 palpis. (2) Head narrower. (3) Front paler and 

 wider. (4) Eyes in $ and ? distinctly converging 

 towards vertex. (5) Abdominal bands less deep, pale 

 hind margins of segments therefore deeper. (6) Hypo- 



