G. MEDICOEUM: DISTINCTIVE CHAEACTEIJS. 101 



bungalow at night" {Dr. W. 31. Graham, W.A.M.S.) ; 1 (^ , 

 Odumase, Gold Coast, March, 1908 (G. C. B ml go on) ; 1 ?, 

 Asaba, Southern Nigeria, 1895 {the late Dr. W. H. Crosse). 



Bionomics. 



Nothing is yet known as to the habits of this species, although 

 from the note quoted above, attached to the specimen taken by 

 Dr. Graham at Sekondi, it would seem that it sometimes moves 

 about after dark, at any rate when attracted by light. 



Affinities and Distinctive Characters. 



As stated above, in the section dealing with the affinities of 

 the foregoing species, Glos.sina medicorum belongs to what may 

 be termed the G. hrevipaljns group, the third member of which 

 is G. longipennis, Corti. Attention has already been drawn to 

 the distinctive characters of G. medicorum as compared with 

 G. hrcvipalpis, Newst., and the former may at once be distin- 

 guished from G. lonr/ijjennis, Corti, by its smaller and narrower 

 head, and by the absence of a dark brown ocellar spot, of a 

 brown tip to the proboscis bulb, and of the dark brown spots 

 on the dorsum of the thorax characteristic of Corti's species. 



From Glossina fusca, Walk., G. medicorum differs in both 

 sexes (apart from the wings, which are usually paler) in the 

 front, viewed vertically from above, being (at least relatively) 

 wider, in the proboscis and palpi being shorter, and the latter 

 (as seen from above) being broader and less slender, and in the 

 absence of a conspicuous dark blotch on each sternopleura ; as 

 regards characters confined to one sex, the ^ of G. medicorum is 

 distinguished from that of G. fusca by the minute spines or 

 bristles forming the hectors being coarser, while in the 9 tlie 

 apical scutellar bristles in the former species are stouter and 

 shorter (about half the length of the corresponding bristles in 

 G. fusca 9 )• Cr- 7nedicoruiit is distinguishable from G. tahani- 

 formis, Westw., which occurs in the same region, inter alia by 

 the third joint of the antenna not being clothed with long and 

 fine pale hair, by the general coloration of the body being as a 

 rule less dusky, by the wings being paler or at any rate not so 

 brown, and by the anterior transverse vein being less coarse. 



