GLOSSINA 



845 



classification, but requires the addition of female characters to complete it. 

 We have, therefore, kept Austen's revised classification in 191 1, which, slightly 

 modified, is as follows : — 



A. Hind tarsi entirely dark (female of Glossina tachinoides) , basal half of 



first and extreme bases of succeeding joints pale, Glossina palpalis 

 group. 



I. Ground colour of abdomen ochraceous buff, with interrupted dark 

 brown deep transverse bands and sharply defined pale hind borders 

 to segments. A very conspicuous square or oblong pale area in the 

 centre of the second segment. Small species: Body length 7 milli- 

 metres- — G. tachinoides Westwood, 1850. 

 II. Abdomen not so marked. 



1. Third joint of the antenna dusky brown to cinereous black. 



[a) Dorsum of abdomen dark sepia brown, median paler area 



on second segment, broad, more or less quadrate or 

 irregular, hypopygium of male buff or ochraceous buff — 

 G. caliginea Austen, 1911. 



[b) Dorsum of abdomen blackish-brown, median paler area 



triangular, hypopygium of male grey — G. palpalis 

 Robineau-Desvoidy, 1830. 



2. Third joint of antenna pale — G. pallicera Bigot, 1891. 



B. Hind tarsi not entirely dark (except in G. austeni). 



I. Upper surface of abdomen with pale ground colour, drab grey, buff, 

 or ochraceous buff, marked with very conspicuous dark brown 

 or clove brown transverse bands interrupted in the middle 

 line— Glossina morsitans group. 

 {a) Last two joints of front and middle tarsi with sharply defined 

 dark brown or black tips. 



(1) Large species: Wide head, darker anteriorly; abdominal 



bands deep— G. longipalpis Wiedemann, 1830. 



(2) Smaller species: Narrower head — G. morsitans Westwood, 



1850. 



' {b) Last two joints of fore and middle tarsi very narrov/ly darker, 



and sometimes the colour is absent in the form.er- — G. austeni 

 Newstead, 191 2. 



(c) Last two joints of fore and middle tarsi pale. Body length 8 to 

 10 millimetres- — G. pallidipes Austen, 1903. 

 II. Upper surface of abdomen not so banded. 



{a) Wings dull sepia coloured, palpi (except in G. tabaniformis) 

 long and slender — Glossina fusca group. 



1, Third joint of antenna fringed anteriorly and posteriorly 



with hairs conspicuous when magnified 15 diameters. 



(a) Longest hairs in front of third joint equal in length from 



one-quarter to one-third of width of third joint; 

 palpi moderately long — G. tabaniformis Westwood, 

 1850. 



(b) Longest hairs in front of third joint equal in length 



from one-half to one-third of width of third joint; 

 palpi noticeably long and slender- — G. nigroftisca 

 Newstead, 1910. 



2. Third joint antennae fringed anteriorly with five short hairs, 



scarcely noticeable when magnified 15 diameters. 



(a) Pleura drab grey, hind coxae buff or greyish-buff — 



G. fusca Walker, 1849. 



(b) Pleura dark grey, hind coxae mouse grey — G. fusci- 



pleuris Austen, 191 1. 



