108 ROBERT NEWSTEAD—ON THE GENITAL ARMATURE OF THE 
Glossina tabaniformis, Westwood. 
This tsetse-fly bears a very striking external resemblance to Glossina medicorum, 
Austen, but is separable from the latter by its slightly longer palpi; by the 
characters of the armature of the male; and the greater length of the lateral 
branches of the hairs on the arista. 
these two species are set forth in the following table :— 
Lateral branches of the 
hairs of the arista. 
Harpe of male. 
tabaniformis. 
Very long, the terminal 
one about one half the 
length of the free end 
(tip) of shaft. 
With four narrow, 
pointed appendages. 
The exact specific differences between 
medicorum. 
Very short, the terminal 
one about one fifth the 
length of the free end 
of the shaft. 
With one broadly lan- 
ceolate appendage. 
Fig. 1—Male armature of Glossina tabaniformis, Westwood ; lateral view. 
Genital armature of the male (fig. 1).—Superior claspers (sc) free, of almost 
uniform width throughout ; apices bluntly and asymmetrically bidentate ; bristles 
very long. Inferior claspers (ic) very broad and rather short ; a few of the hairs 
at the margin rather long, the rest short. Median process not reaching the distal 
