152 ^Ir. E. E. Austen — ^1 Revised 



Synopsis of Species of the Genus Glossina. 



1. Iliud tarsi entirely dark, or at least all thejoints 



more or less dark (iu the $ of Gl. tuchi- 

 noides the basal half of the first joint and the 

 extreme bases of the two following joints are 



usually pale) 2. 



Hind tarsi not entirely dark ; last two joints 

 alone dark, remainder pale 4. 



2. Ground-colour of abdomen ochraceous buff, 



with inteiTupted dark brown transverse 

 bauds, and sharply defined pale hind borders 

 U) the segments; a ver}' conspicuous square 

 or oblong pale area in the centre of the 

 stcoiui segment : small species, not ex- 

 ceeding 8 mm. in length (exclusive of pro- 

 boscis), (S considerably smaller tachmoides, Westw. 



Abdomen not so marked, very dark, hind 

 borders of segments if lighter extremely nar- 

 row and cinereous ; pale area in centre of 

 second segment usually triangular, with apex 

 directed backwards and continued into a 

 cinereous median stripe : larger species .... 3. 



3. Third joint of antennse dusky brown to cine- 



reous black jxilpol.s, Rob.-Desv. 



Third joint of antennse pale (orange-buft") .... ;)fl//jce/Y/, Bigot. 



4. Large species: length at least 11 mm. (5j lin.), 



wing-expanse (measured from tip to tip, 

 when wings are set at right angles to body) 



at least 25 mm. (llf lin.) . . . '. ". . 7. 



Smaller species : length rarely reaching 11 mm. 

 (5j lin.), often considerably less ; wing- 

 expanse not exceeding 25 mm. (llf lin.) . . 5. 



5. Last two joints of front and middle tarsi with 



shai-ply defined dark brown or black tips . . 6. 

 Last tAAO joints of front and middle tarsi with- 

 out sharply defined dark brown or black 

 tips ; front and middle tarsi entirely yellow, 

 or last two joints of former faintly tipped 

 with pale brown pallidipes, Austen, 



6. GeneraUy distinctly larger ; head wider ; front 



darker and narrower in both sexes, sides 

 parallel in J ; abdominal bands deeper, 

 leaving hind margins of segments only nar- 

 rowly pale; h}-popygium in c? smaller, 

 darker, and more hairy ; tip of cJ abdomen 

 more thickly clothed laterally with short 

 black hair, bristles on sixth segment finer 



and less prominent lonyipolpis, Wied. 



Usually smaller; head narrower; front paler 

 and wider ; eyes in J as well as in $ dis- 

 tinctly converging towards vertex ; abdo- 

 minal bands le.'^s deep, pale hind margins of 

 segments therefore deeper ; hypopyginm in 

 cJ larger, paler, somewhat more oval in out- 

 line, and clotied with fewer fine hairs ; tip 



