BASED ON A STUDY OF THE MALE GENITAL ARMATURE. 25 
instunce however has it been found fully extended, but in all cases it was seen 
lying in a folded and contorted position similar to that which is shown in fig. 10 
on the right side of the illustration (ap). 
Though closely related to G. palpalis, the armature of the male may be easily 
determined by the great length of the faleiform or claw-like extensions of the 
superior claspers ; the inferior claspers are also much more gradually attenuated 
and the toe or apex of the foot-like process is furnished with three or four small 
hairs. There are also other minute differences such as the form of the vesica 
and the juxta, but the most marked morphological character is the great length 
of the tooth-like extension of the superior clasper which gives this structure a 
very distinct and marked character. 
Glossina tachinoides, Westwood. 
= 
Genital armature of the male (fig. 11).—Superior claspers (se) united by + 
membrane ; in shape they are identical with those in Glossina palpalis, but are 
Fig. 11.—Male armature of Glossina tachinoides, Westw. ; ventral view. 
relatively smaller. Connecting membrane (cm) spinose on both surfaces, and 
deeply divided centrally. Inferior claspers (éc) with the mner lateral margin 
proximally produced and broadly rounded ; beyond this prominence the process 
is broad and parallel-sided ; the outer lateral margin at the distal extremity is 
suddenly rounded and deeply emarginate ; the inner lateral portion being extended 
into a foot-like process on the edge of which are two or three minute hairs. The 
editum (e), the harpes (4) and the vesica (v) are all specifically identical with the 
corresponding organs in G. palpalis; and although these organs respectively 
may appear to differ slightly in the illustrations, the differences are simply due to 
the orientation in the mounted preparations. 
It may be readily seen on comparing the figure of G. tachinoides with that of 
G, palpalis that the morphological characters of the species are almost identical ; 
the only salient characteristic being the curious form of the inferior claspers im 
G. tachinoides, which will at once serve to distinguish the male of this tsetse from 
the male of G. palpalis. 
