26 GLOSSINA PALPALIS VAE. WELLMANI. 



bristles in the 9 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 ^ . 



Abdomen. — Dorsum clove-brown or blackish-brown ; first seg- 

 ment 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 as far as the hind 

 margin of the fifth segrgent ; 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 ^ , entirely 

 grey. 



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 in diagnosis printed in italics above. 

 Squamae waxen-white, border of the antisquama darker, fringed 

 with short, darker hairs. Holier es cream-buff.* 



Glossina pal/palis var. wellmani, Austen. 



Glossina palpalis uiellmani, Austen, Annals and Magazine of Natural 

 History, Ser. 7, Vol. XV, p. 390 (April, 1905). 



Glossina bocagei, Franpa, Jornal de Sciencias Mathematicas, Physicas e 

 Naturaes, 2« S6r., T. VII, No. xxvii, p. 134 (June, 1905). 



^ , 9 • — DistinguisJiahle 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 



* For an account of the internal anatomy of Glossina palpalis, see 

 Minchin, Proceedings of the Royal Society, Vol. 76b, pp. 531-547 (1905) : 

 for the structure of the proboscis, see Stephens and Newstead, Liverpool 

 School of Tropical Medicine, Memoir XVIII, pp. 53-74, Six Plates (1906). 



