48 



CHAPTER V. 

 THE GLOSSINA MORSITANS GROUP. 



SYNOPSIS OP SPECIES. 



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 with- 

 out 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 penultimate joint of 

 middle tarsi light brown — never so dark as 

 to form a sharp contrast with the remaining 

 joints) pallidipes, Austen. 



2. Third joint of antennae with a distinct fringe 



of fine hair on front margin ; dark brown 

 or clove-brown bands on abdominal seg- 

 ments extending close to hind margins (i.e. 

 pale ground colour, apart from the median 

 interspace, confined to a very narrow hind 



border) longipalpis, Wied. 



Third joint of antennae without a distinct 

 fringe of fine hair on front margin ; dark 

 brown or clove-brown bands on abdominal 

 segments not extending close to hind 

 margins morsitans, Westw. 



Glossina morsitans, Westw.* 



(Plate V.) 



Glossina morsitans, Westwood, Proc. Zool. Soc. Lond., Part xviii, p. 261, 

 Plate IX, figs. 1, la— If (1850) ; Kirk, " On the ' Tsetse ' Fly of Tropical 

 Africa" (Glossina morsitans, Westwood), Journ. Linn. Soc, Zoology, 

 Vol. VIII, pp. 149-156 (1865) ; Austen, " A Monograph of the Tsetse- 

 Flies," p. 81, Plate III (1903), and British Medical Journal, 

 September 17th, 1904; Sander, "Die Tsetsen," pp. 60-63 (Leipzig: 

 J. A. Barth, 1905) ; Newstead, Bulletin of Entomological Research, 

 Vol. II, Part 1, p. 32, fig. 16 (male genitalia) (April, 1911). 



(J, $. — Length, ^ (15 specimens, from various localities) 

 7*2 to 9 mm., ? (11 specimens, from various localities) 8-6 to 



* The designation Glossina morsitans, as used in this book, includes 

 G. submorsitans, Newst. As explained on pp. 51, 52, the author, provisionally 

 at any rate, is inclined to regard G. submorsitans, Newst., as a form or 

 race of G. morsitans, Westw., rather than as a distinct species. 



