MUSCID^ : THE BLOOD-SUCKING MUSCIDiE 177 



thickened ; and (4) the hypopygium of the male more nearly 

 oval in outline. 



Glossitia nigrofusca, Newstead. 



According to Austen, the range of this species extends 

 at any rate from Ashanti to the Congo Free State. The 

 species differs from G.fusca; (i) by having the 3rd segment 

 of the antennae clothed with long fine pale hair, which forms 

 a conspicuous fringe to both borders of the segment, the 

 width of the fringe on the anterior border being from one- 

 half to three-fourths the breadth of the segment ; and (2) in 

 the greater number — twenty-two to twenty-eight or twenty- 

 nine — of the hairs of the arista. It is said to enter houses. 



Glossina tabaniformis, Westwood, Austen. 



According to Austen, the area of distribution, so far as it 

 it is known, includes the Ivory and Gold Coasts, Southern 

 Nigeria, and the Congo Free State. G. tabaniformis is 

 believed to be found near houses and to board river- 

 steamers, and to bite at night. It differs from G. fusca 

 much in the same way that G. nigrofusca does, and differs 

 from the latter species in having (i) the palpi and proboscis 

 much shorter ; (2) the fringe of hairs on the borders of the 

 3rd segment of the antennae narrower, the longest hairs of 

 the front margin being only from one-fourth to one-third the 

 width of the segment ; and (3) only eighteen to twenty-three 

 hairs on the arista. 



Glossina brevipalpis, Newstead. 



According to Austen, this is the common large tsetse-fly 

 of many parts of Southern, Central, and Eastern Africa, 

 being found in Angola, the southern part of the Congo 

 Free State, North-eastern Rhodesia, Nyassaland, and in 

 Portuguese, German, and British East Africa. It is said 

 to bite early in the morning and in the evening, and it has 

 lately become suspect as a possible nurse of the trypanosome 

 of sleeping-sickness in certain places where G. palpalis is 

 believed not to exist. One of the most striking points of 

 the species, to casual view, are the wings with the region of 

 the anterior and posterior cross-veins so much darkened 



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