37i 
can do in the light of this discovery is, 1 feel, to make G. pallidipes 
a colour variety of G. longipalpis. 
A more extensive paper dealing with the morphological 
characters of the genital armature of all the known tsetse flies is in 
the course of preparation, and will be published early in the new 
year, together with a series of illustrations which will aid the 
student in the exact determination of this genus of pathogenic 
insects. 
Glossina submorsilans f n. sp. 
Nearly related to Glossina morsitans, Westw., in having the tips 
of all the tarsi dark. There are two well-marked varieties: a 
dark form and a light form. The former may be readily 
distinguished by its general dusky or dull vinous-grey colour and 
generally smaller size; the pale form, however, very closely 
resembles G. morsitans in the general colour of the abdomen; but 
the bilateral abdominal bands are: — 
(a) much more clearly and sharply defined. 
(b) equally and more narrowly interrupted in the median line, 
between the thirds fourth, and fifth segments. 
(c) slightly rounded medially and suddenly tapering towards 
the lateral margins. 
In G. morsitans the bands are: — 
(a) not so sharply defined medially. 
(b) gradually interrupted in the middle line, the space 
between the third being much greater than the space 
between the fifth, and the dark colour gradually shades 
off into the pale colour forming the median line. 
(0 broadly rounded medially, and a very gradually tapenng 
towards the lateral margins. 
The morphological character of the genital armature of the 
males of these species, respectively, are easily separable by the 
form of the median processes. 
Dark Form. — Thorax grey, with the usual dark brownish 
longitudinal markings, generally relatively small, sometimes 
reduced to elongated spots. Abdomen dull olivaceous grey, with 
