XVl] DESCRIPTION 257 



brown patch on each side of the median line more or less conspicuous ; apical 

 scutellar bristles in the female variable in length — (sometimes as in specimens 

 from the Congo Free State and Uganda) short, sometimes (as in specimens 

 from Liberia, Sierra Leone, and the Gambia) nearly as long as in the male. 



Abdomen. — Dorsum clove-brown or blackish-brown ; first segment and a 

 median triangular area on the second (its base resting on the front and its 

 apex on the hind margin of the second segment) buff-coloured or cinereous, 

 the pale triangle continued backwards as a narrow, more or less well-defined 

 median stripe, usually reaching at least so far as the hind margin of the fifth 

 segment ; lateral margins of the segments from the second onwards grey^ 

 expanded on the apical angles into triangular markings, extreme hind margins 

 of the segments from the second to the sixth usually narrowly pale or grey ; 

 seventh segment, as also the hypopygium in the male, entirely grey. 



^ 



I 



Fig. 65. Glossina palpalis. Photographs taken by Dr Graham, on the Gold 

 Coast, shewing the flies in a position of rest. The fly to the left is magnified 

 3^ diameters, those to the right are of natural size. (From the Sleeping 

 Sickness Bulletin.) 



Legs. — Last joint of front and middle tarsi dark brown, often more or less 

 buff at base, sometimes distal third alone dark brown, remainder buff ; 

 penultimate joint of front and middle tarsi dark brown, more or less buff at base. 



Wings as described above. Snuamcs waxen-white, border of the antisquama 

 darker, fringed with short, darker hairs. 



H alter es cream-buff. 



Glossina palpalis var. wellmani Austen (1905). 



Synonym. G. bocaqei Fran9a, 1905. 



" <? , ? — Distinguishable from typical G. palpalis, Rob.-Desv., by a peculiar 

 reduction in the markings of the dorsum of the thorax. 



" Frontal stripe pale ochraceous ; thoracic markings much reduced, so 

 that the thorax in a well-preserved specimen appears spotted, the antero-lateral 

 markings taking the form of spots or blotches ; the spot immediately behind 

 the inner extremity of the humeral callus on each side small, ovoid, or nearly 

 circular, and especially conspicuous when the insect is viewed from above and 

 slightly from behind ; femora pale, the dark area much reduced." 



H.B.F. 17 



