6o6 



THE ANIMAL PARASITES OF MAN 



pallidipes, Austen. 



Last two joints of front and middle tarsi with 

 sharply defined clove brown or black tips 



Last two joints of front and middle tarsi without 

 sharply defined clove brown or black tips (front 

 and middle tarsi either entirely pale or, at most, 

 last two joints of front tarsi faintly brownish at 

 the tips), and last joint and distal half of penul- 

 timate joint of middle tarsi light brown, never so 

 dark as to form a sharp contrast with the 

 remaining joints 



Third joint of antennas with a distinct fringe of fine 

 hair on front margin ; dark brown or clove-brown 

 bands on abdominal segments extending close to 

 hind margins (/.*., pale ground colour, apart from 

 the median interspace, confined to a very narrow 

 'hind border) ... longipalpis, Wiedeman. 



Third joint of antennae without a distinct fringe of 

 fine hair on front margin ; dark brown or clove- 

 brown bands on abdominal segments not extend- 

 ing close to hind margins morsitans, Westwood 



in. 



Glossina fusca GROUP. 



Third joint of antennae fringed with fine hair on 

 anterior and posterior margins ; fringe on anterior 

 margin conspicuous under a hand lens magnify- 

 ing 1 5 diameters (nominal) when head is viewed 

 in profile ... ... ... ... ... ... 2. 



Third joint of antennae with fringe of fine hair on 

 anterior margin so short as to be scarcely notice- 

 able under a hand lens magnifying 15 diameters 

 (nominal) when head is viewed in profile (longest 

 hairs in fringe in length not exceeding one-sixth 

 of width of third joint) ; palpi long and slender ... 3. 



Longest hairs in fringe on front margin of third 

 joint of antennae, in length equal to from one- 

 fourth to one-third (not exceeding one-third) of 

 width of third joint ; palpi of moderate length ... 



Longest hairs infringe on front margin of third joint 

 of antennae in length equal to from one-half to 

 three-fourths of width of third joint ; palpi 

 noticeably long and slender 



Pleurae drab-grey or Isabella-coloured, hind coxae 

 buff or greyish-buff .. ; 



Pleurae dark grey ; hind coxae mouse-grey ... 



tabaniformis, Westwood. 



nigrofusca, Newstead. 



fusca, Walker. 

 fuscipleuris, Austen. 



Glossina brevipalpis GROUP. 



i. Dorsum of thorax with four sharply defined brown, 

 more or less oval or elongate spots, arranged in 

 a parallelogram, two in front and two behind the 



