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 hands 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 

 larsi entirely black. Wings normal ; halteres pale yellowish, translucent. 



Types (^ Q (Coll. British Museum) Katagum River, between Katagum and 

 Geidam, Northern Nigeria (Dr. F. W, McKay). 



Pale Form. — 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 ou 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. 

 Kinghorn at Sabiya-Bofe, Northern Ashanti, 24.1 V. 10. Eight 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 rnorsitans ; width of distal margin nearly three times that of the narrowest 



Fig. 17. — Male armature of Glosshia siibmorsitaii.t, 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 



