DESCEIPTIOX OF GLOSSINA NIGROFUSCA. 77 



Distribution of G. fuscipleuris, sp. nov. 



Since the type is the only example of G. fuscipleuris yet 

 received, all that can at present be said as to distribution is that 

 the species occurs in the forest region in the north-east of the 

 Congo Free State. 



Bionomics. 

 Unknown. 



Affinities and Distinctive Characters. 



Mention has already been made of the fact that this species 

 belongs to the Glossina fusca group.* From G. fusca itself, 

 which is its nearest ally, G. fuscipleuris may be distinguished by 

 the characters afforded by the pleurae, hind coxae, and hypopygium, 

 as noted in the diagnosis and description printed above. From 

 G. nigrofusca, Newst.jf and G. tahaniformis, Westw.,| G. fusci- 

 pleuris, apart from its smaller size, differs in the third joint of 

 the antennae not being conspicuously fringed with fine hair ; 

 from G. tahaniformis the present species may also be distinguished 

 by the (at least relatively) greater length of its palpi. 



Glossina nigrofusca, Newst. 



(Fig. 18.) 



Glossina nigrofusca, Newstead, Annals of Tropical Medicine and Parasit- 

 ology, Series T. M., Vol. IV, No. 3, p. 370 (December 20, 1910). 



Glossina grossa, Newstead, ibid., p. 373 {nee Bigot). 



(J, 9- — Length, ^ (2 specimens) 12*4 mm., 9 (2 specimens) 

 12-2 mm.; width of head, ^ 3-4 to 3-75 mm., ^ 3-75 mm. ; 

 width of front at vertex, ^ 0-6 to just under 1 mm., ^ 1 nam. ; 

 length of portion of palpi projecting beyond margin of buccal 

 cavity, (J 4 to 4-4 mm., $ 4-8 mm.; length of wing, (^11 to 

 11*75 mm., ^ 12-75 mm. 



Besemhling Glossina fusca. Walk, (see p. 69 and Plate VIII), 

 especially in the 9 sex, hut distinguishable inter alia by the third 

 joint of the antennae being clothed with long and fine pale hair,. 



* Cf. p. 74. t Sec below. J P. 81. 



