BASED ON A STUDY OF THE MALE GENITAL ARMATURE. 29 
It may be interesting to add that there are some curiously malformed bristles 
present upon the right clasper (see fig. 13); these give off a fine lateral hair 
towards the apex the tip of which points backwards, so that a reversed bifurca- 
tion is produced, This striking malformation is not peculiar to this tsetse-fly as 
similar instances have been observed in Glossina submorsitans and also in other 
species of the genus. 
Glossina longipalpis, Wiedemann. 
Genital armature of the male (figs. 14, 154). Superior clasper (sc) completely 
united by a membrane and also fused medially ; base narrower than the greatest 
width of the distal portion; general outline broadly spathuliform ; stem in its 
narrowest portion about one third the width of the distal portion ; distal margin, 
on the outer lateral portion, with a large tooth-like extension ; the remaining 
Sc. 
Fig. 14.—Male armature of Glossina longiplpis, Wied. ; ventral view. 
portion broadly rounded and furnished with a closely set series of stout spines, the 
smallest arising from near the base of the tooth-like projection ; these gradually 
lengthen as they extend towards the base of the clasper; bristles on the outer 
lateral half unusually long, being equal to three-feurths the entire length of the 
clasper ; there is also a single, but shorter bristle arising from the base of the 
tooth-like projection which curves outwards and inwards in the same way as 
has been observed in the corresponding bristles found in G. morsitans and G. sub- 
morsitans ; each clasper has also a thin but strongly chitinised flange-like 
extension which meets the one on the opposite clasper with which it is apparently 
fused, though a faint straight suture is visible between them; this process 
extends tu the widest portion of the claspers where it terminates suddenly and 
sometimes presents a small median emargination ; but there are no lobe-like 
extensions as in G, morsitans and G. submorsitans. The dorsal surface of this 
