32 ROBERT NEWSTEAD—A REVISION OF THE TSETSE-FLIES (GLOSSINA), 
the morphological differences were found to exist. I am delighted therefore 
to be able to refute the statement previously made by me (/.c.) and to express my 
indebtedness to Mr, Austen for so generously placing the specimens at my disposal. 
Glossina morsitans, Westwood. 
Genital armature of the male (fig. 16). Superior claspers (sc) completely 
united dorsally by a thin membrane which is thickly studded with minute spines ; 
form somewhat like the scapula of a mammal; each clasper is furnished on the 
inner lateral margin with a strip of pale chitin which curves outwards and touches 
Minvwniaeee 
Fig. 16. Male armature of Glossina morsitans, Westw. ; ventral view. 
the process on the opposite side near the distal extremity only ; apices divergent, 
forming a recurved lobe-like extension (ml) ; inner lateral group of hairs usually 
relatively shorter than the corresponding group in G. submorsitans ; these hairs 
gradually shorten distally and finally merge into strong black spines, the latter 
also gradually shortening distally and becoming quite minute on the posterior or 
distal margin. There is a single long hair which has its origin within the 
margin near the centre of the median process; in the figure this bristle is shown 
projecting beyond the clasper and is, in all probability, in its normal position, 
though in a number of examples it lies pointing towards the proximal portion of 
the claspers. Harpes (/) small, spinose, curved upwards and rounded at the 
tips; basal process also curved upwards and presenting no very definite form. 
Vesica, or median process, very small and broadly rounded, Juxta (/) broadly 
