DESCEIPTION" OF GLOSSINA TABANIFOEMIS. 81 



segment in the male is also broader in the former than in the 

 latter. In size and general appearance there is a close resem- 

 blance between 6*. nigrofusca and G. tabaniformis, Westw.,* but 

 the former may be distinguished by the greater length of the 

 palpi, as well as of the hair on the anterior and posterior edges 

 of the third antennal joint. 



Glossina tabaniformis, Westw. 



(Fig. 19.) 



Glossina tabaniformis, Westwood, Proc. Zool. Soc. Loud., Part XVIII, 

 p. 268, Plate XIX. fig. 3 (1850) -.—nee Stuhlmann, Bericht iiber Land- 

 und Forstwirtschaft in Deutsch-Ostafrika, Bd. i. Heft 2, p. 173 (1902). 



Glossina grossa, Bigot, Ann. Soc. Ent. Fr., Vol. LX, p. 877 (1891). 



$ 9 . — Length, $ (1 specimen) 10*4 mm., $ (4 specimens) 

 10-25 to 10-8 mm. ; width of head, $ 3-25 mm., ? 3-4 to 3-5 mm.; 

 width of front at vertex, ^ 0'6 mm., 9 0'6 to just under 1 mm. ; 

 length of portion of palpi projecting beyond margin of buccal 

 cavity, $ 3 mm., 9 3 to 3-25 mm. ;f length of wing, ^ 10 mm., 

 9 11-75 to 12-25 mm. 



Large, dark brown, dusky-winged species, closely resembling 

 G. nigrofusca, Newst., in general appearance, but distinguished by 

 the palpi (and proboscis) being much shorter, and by the length of 

 the fringe of fine hair on the anterior edge of the third joint of the 

 antennae not exceeding one-third {instead of being equal to from one- 

 half to three-fourths) of the loidtli of the third joint {cf. Figs. 19 

 and 18). " ' 



Head cream-buff, antennal cavity pearl-grey, posterior surface 

 of head mouse-grey ; frontal stripe mummy-brown, paler ante- 

 riorly ; ocellar spot inconspicuous, of same colour as frontal stripe, 

 transverse band joining bases of vertical bristles dark brown ; 

 antennae partly buff, partly dark brown or brownish, second joint 

 mainly dark brown or more or less brownish, third joint dark 

 brown (a larger or smaller area at base buff or cream-buff), often 



* See below. 



t In the case of the type of G. grossa, Big. (a ? ), which, through the 

 kindness of Mr. G. H. Verrall, is now in the British Museum (Natural 

 History), the portion of the palpi projecting beyond the margin of the 

 buccal cavity is somewhat longer, and measures 3-5 mm. 



G 2 



