3^9 
ON THREE NEW SPECIES OF THE GENUS 
GLOSSINA,TOGETHER WITH A DESCRIP¬ 
TION OF THE HITHERTO UNKNOWN 
MALE OF GLOSSINA GROSS A, BIGOT 
BY 
ROBERT NEWSTEAD, M.Sc., A.L.S., &c. 
(Received for publication 15 December , 19 10 ) 
The discovery of the three species of Glossina herein described 
was brought about by an examination of the morpholo^ica 
characters of the genital armature of the males. In the first 
instance some doubt had been entertained legarding the corr 
specific identity of certain dark forms of tsetse flies which hac e 
placed in the collections of this School as doubtful examp es o 
Glossina morsitans, West. 1 he examples in question weie captu 
by Major Dansey-Browning, in the Bahr-el-Ghazal Province o 
Sudan, during the winters of the years 1905 and 190 . 
captures were recorded* by him in the year 1908, with a note a 
the peculiar dark colour which they presented in life. More rece ) 
a long series of tsetse flies, which were collected by r. • 
McCay, on the Katangum River, between Katangum and ei a 
Northern Nigeria, were presented to this School. These examp e 
were found to be specifically identical with those taken m 
Sudan. On comparing the genital armature of these dai 
with those of typical G. morsitans from Rhodesia, it was founc 
they were structurally distinct; it became necessary, therefore, to iaise 
the dark forms to specific rank. On the examination o f some ue 
examples of the so-called Glossina morsitans one found a so a 
these presented the same morphological characteis as those o 
dark forms both from the Sudan and Katangum. 1 > 
interpretation of these specific differences is that all the tsetse ies 
occurring in the western regions of Africa which have hitherto 
* Jour. Rov. Army Med. Cor., Vol. X, p. 427- 
