100 DISTEIBUTION OF GLOSSINA MEDICOEUM. 



each hector separated from those of the opposite group by a 

 sharply defined interspace of perfectly bare integument, whereas 

 in the case of G. hrevijjalp's the minute bristles forming the 

 hectors are less coarse, less closely set, and generally intermingle, 

 at least in front, so that the interspace is as a rule partly 

 obliterated. 



Legs buff or cream-buff; front femora usually more or less 

 infuscated on inner side, middle and hind femora often with a 

 small, elongate, dark brown or mummy-brown blotch on under 

 side near distal extremity ; hind tibiae usually with a more or 

 less indistinct vestige of a dark brown ring round middle, a trace 

 of a corresponding ring also sometimes visible on middle tibiae ; 

 tips of last two joints of front and middle tarsi, and last two 

 joints of hind tarsi, except extreme base of penultimate joint, 

 blackish-brown. 



Wings pale Isabella-coloured, practically unicolorous, distal 

 portion not noticeably darker than proximal third, and upper, 

 thickened portion of anterior transverse vein not (as in 

 6^. hrevijjdlpis) much darker in colour than adjacent veins, and, 

 therefore, not standing out conspicuously against the rest of the 

 wing, as is the case in the species mentioned ; veins tawny- 

 ochraceous or cinnamon-coloured. 



Squamae and fringe, and halteres as in G. brevipalpis. 



The typical specimens are a ^ and 9 in the British 

 Museum (Natural History), from the Sangwin River, Liberia, 

 West Africa, 27. xi. 190^, taken and presented by Surgeon 

 A. McCloy, R.N. 



Pale form. — In addition to that described above as tyj^ical, 

 there appears to occur a form of this species in which the 

 coloration of the body is decidedly paler ; the specimens from 

 Odumase, Gold Coast, and Asaba, Southern Nigeria, mentioned 

 below, belong to this form, which there is no reason to regard as 

 anything more than a mere colour-variety. 



Distribution of G. medicorum, sp. nov. 



Up to the present time, this species of Tsetse has been found 

 only in West Africa (Liberia, Gold Coast, and Southern Nigeria). 

 In addition to the types of the ^ and ? , the following specimens, 

 also contained in the National Collection, have been examined : — 

 1 ^ , same locality and date as types {Surgeon A. McCloy, B.N.) ; 

 1 $, Sekondi, Gold Coast, 28. vii. 1907, "caught in P. W. D. 



