X"^^l] CLASSIFICATION 249 



II. Glossina morsitans group. 



1. Last two joints of front and middle tarsi with sharply defined, clove- 

 brown or black tips . . . . . . . . . . . . —2. 



Last two joints of front and middle tarsi either entirely pale or, at most, 

 faintly brownish at the tips, never so dark as to form a sharp contrast with the 

 remaining joints =_paH;rf!^es, Austen (p. 271). 



2. Third joint of antenna fringed with fine hairs on front margin. The 

 dark brown transverse abdominal bands extending close to the hind margins 

 of the segments =longipalpis, Wied. (p. 274) 



Third joint of antenna; not fringed with fine hairs on front margin. Trans- 

 verse abdominal bands not extending close to the hind margins of the segments. 



= m.oysitans, Westw. (p. 276). 



(a) JIarkedly paler than typical morsitans, but more or less agreeing in 

 its general characters . . morsitans var. pallida, Shircore. 



(6) Resembling morsitans but distinguished by having all the joints of 

 hind tarsi dark as in palpalis group . . morsitans var. paradoxa, Shircore. 



III. Glossina fusca group. 



f Third joint of antennae fringed with fine hairs on anterior and posterior 

 margins. Fringe on anterior margin conspicuous under a hand lens 

 ( X 15) when fly is examined in profile . . . . . . . . = 2 



Third joint of antenna; with fringe of hairs on anterior margin so short as to 

 I be scarcely noticeable under a hand lens, the longest hairs not exceed- 



L ing one-sixth the width of the third joint. Palpi long and slender =3 



f Length of longest hairs on anterior margin of third joint of antenna? equal 

 <J to from one-fourth to one-thirdof the width of joint. Palpi of moderate 



l_ length. Number of hairs on arista 18 to 23 =tabanifor'iKis, Westw. 



f Pleurse drab-grey or Isabella-coloured ; hind coxas bufi: or greyish-buff 

 -<J =fusca. Walk. 



L Pleuroe dark grey ; hind coxae mouse-grey . . —fiiscipleuris, Austen. 



<; 



IV. Glossina brevipalpis group. 



r Dorsum of thorax mth four sharply defined, dark brown, more or less oval 

 I or elongate spots, arranged in a parallelogram, two in front of and two 



J behind the transverse suture. Proboscis bulb with a sharply defined 



I brown or dark brown tip . . . . =longipennis, Corti (p. 286). 



I Dorsum of thorax without such spots. Proboscis bulb not dark or brown 



L at tip =2 



f Wings with upper, thickened portion of anterior transverse vein much 

 I darker in colour than adjacent veins and thus standing out conspicu- 



<( ously against the rest of the wing =brevipalpis, Newstead (p. 288). 



I Wings with the part in question not darker than the adjacent veins, the 

 L wdngs being practically unicolourous .. =medicoriim, A.nsten. 



