34 ROBERT NEWSTEAD—A REVISION OF THE TSETSE-FLIES (GLOSSINA), 
in the middle by the olivaceous grey, or grey, ground colour, the latter forming 
a continuous median stripe ; the dark bands occupy the basal two-thirds of each 
segment, they taper towards the lateral margin but their inner margins are almost 
straight. Legs varying from pale buff to dusky buff; front femora inside, the 
middle and hind pair on the outside, more or less infuscated ; front and middle 
tarsi with the last two segments black at the tips; last two segments of hind 
tarsi entirely black. Wings normal ; halteres pale yellowish, translucent. 
Types S © (Coll. British Museum) Katagum River, between Katagum and 
Geidam, Northern Nigeria (Dr. F. W. McKay). 
Pate FormM.— Thorax with markings similar to those in the dark form, but 
the pleurae generally paler. Abdomen greyish buff, with a pale vinous tinge ; 
blackish bands very sharply and clearly defined and narrowly interrupted in the 
median line; those on the third, fourth and fifth segments being equally separated ; 
the bands are also only very slightly rounded medially and rather suddenly so 
towards the lateral margins. Legs as in the dark forms. 
Two co-type males and a female (Coll. Brit. Mus.) were captured by Dr. A. 
IGnghorn at Sabiya-Bofe, Northern Ashanti, 24.1V.10. Hight additional 
specimens were also captured by Dr. Kinghorn in various localities in Ashanti 
all of which have pale abdomens. 
Genital armature of male (fig. 17)—Superior claspers (sc) very like those of 
Glossina morsitans ; width of distal margin nearly three times that of the narrowest 
Fig. 17.—Male armature of Glossina submorsitans, Newst. ; ventral view. 
portion of the stem ; each clasper is furnished, on the inner lateral margin, with 
a broad parallel-sided strip of pale chitin the tip or distal extremity of which is 
