68 G. LONGIPALPIS : DISTINCTIVE CHAEACTEES. 



presence of a distinct fringe of fine hair on the front margin 

 of the third joint of the antennae, and by the narrowness 

 of the pale hind margins to the banded abdominal segments. 

 The similarity in general appearance between Glossina longipalpis 

 and its eastern i*epresentative G. pallidipes has been referred to 

 in the diagnosis printed in italics above, where the external 

 characters by which the two species may be distinguished are 

 also pointed out ; it may be added that Glossina longipaljris is 

 usually a smaller insect than G. paUidijjes, and that the specific 

 differences presented by the male genital appendages have quite 

 recently been elucidated by Mr. Newstead. 



