183 



NOTES ON THE MOVEMENTS OF GLOSSINA MORSITANS 

 IN THE I.UNDAZI DISTRICT, NORTH EASTERN RHODESIA. 



By p. E. hall, Natiye Commissioner, Lundazi. 



(With Sketch-Map.) 



At the suggestion of Mr. S. A. Neave, I have prepared the following brief 

 notes of my observations on the changes in the distribution of Glossina 

 morsitans within the Lnndazi District. 



I came to this district (then known as the Navvalia District) in September 

 1901 ; I left it in March 1907, and returned to it again in January 1909. 

 From the time I came to the district I have always been on the watch for, 

 and noted the presence of, tsetse. 



In the attached sketch-map I show : — 



(1.) Areas where I found fly in 1904-5-6, coloured green ; all this area 



is still fly-infested. 



(2.) Areas which, to the best of my knowledge, were clear of fly up to 



the end of 1906, but which are now fly-infested, coloured pink. The 



negative evidence is always my own observation, plus statements of 



the villagers (not very vahiable ; for again and again v/hen they have 



snid there were no tsetse, I have found some in a short while) — and 



generally reinforced by the presence of native cattle in good condition. 



The PINK patch extending northward from Tembwe's, on the Lupamazi 



River, I have inserted on the authority of Mr. H. Forsyth, a farmer 



near Fife and C/hinsali, who brought a large herd of cattle down 



through that region in 1905, and who has been hunting elephant in 



the same area this year. I think complete reliance can be placed on 



Mr. Forsyth's statements. 



(3.) A small yellow patch, east of Lundazi Boma, extending across the 



Nyasaland border to an open marshy " dambo ^' stream, Mtuzuzu, 



draining to the South Rukuru River. This was most certainly clear of 



tsetse a year ago, and the cattle in that area appear to be still in 



good health ; but I have been out there twice this month on a track I 



am clearing to Loudon Mission, and each time I have seen a specimen 



or two on the Mtuzuzu. 



(4.) The MAUVE areas represent those which are now fly-infested, but of 



which I am unable to say definitely that they were or were not 



infested in 1906 and earlier. 



(5.) The BLUE colour signifies areas which are still clear, to the best of my 



knowledge. 

 (6.) Areas about which I have no knowledge are left blank. 



BULL. ENT. RES. VOL. I. PART 3, OCTOBER I9IO. 



