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. palp alls. 
In 3 the arista is stouter and longer than that in Gl. 
(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. —(1) Smaller than G. longi- 
palpis. (2) Head narrower. (3) Front paler and 
wider. (4) Eyes in 3 and 2 distinctly converging 
towards vertex. (5) Abdominal bands less deep, pale 
hind margins of segments therefore deeper. (6) Hypo- 
