GLOSSINA MORSITANS IN NORTHERN RHODESIA. 



Table II. 

 Comparing the Collection of Pupae in relation to the Amount of Game in an Area. 



69 



A similar condition of things as regards the game, the pupae, and the hunger of the 

 fly was found at Ngoa in the various areas in which pupae were collected. These will 

 be briefly described. 



(1). A forest area bordered by the Kalamba Stream, and previously described 

 in detail (Bull. Ent. Res., v, 1914, p. 57). It was usually very attractive to game 

 owing to the mud wallows in the stream bed. This year the stream was dry and the 

 grass unburnt, and there was no particular attraction to game, though animals 

 passed through fairly frequently. Fly was troublesome and it was not unusual to be 

 bitten thirty or forty times during the morning. Five days' work yielded 259 pupae 

 and 677 cases. Pupae were much more freely found about the same time of year in 

 1913 when the stream was flowing and game, especially rhinoceros, moving regularly 

 there. 



(2). This area is also part of that previously described. It is bordered by a 

 swamp and narrow vlei and contains salt-licks. The grass had been burnt off a 

 fortnight before the work was commenced, and the fire had passed right across the 

 swamp, burning the reeds down to the roots. A new growth had sprung up at once 

 and this made the spot very attractive to game. A herd of about twenty roan were 

 feeding regularly on the swamp and were spending the middle of the day in this area 

 and the one next to be discussed. Zebra and eland had also been feeding there. 

 As the camp was in this area the animals left after a few days. During the month 

 spent at this place the fly became increasingly troublesome as the game moved away. 

 In four days' work 344 pupae and 409 cases were taken ; a much heavier yield than 

 in 1913, when part of the area was avoided by the game o\ving to the presence of our 

 permanent camp, 



(3). This is a Uttle triangular area about a quarter of a square mile in extent, 

 bounded on two sides by the vlei and burnt swamp mentioned above. I had not 

 seen game in it previous to this occasion, with the exception of once some puku and 

 reedbuck. It was now a regular haunt of the herd of roan. It was searched in July 

 and August 1913 on several occasions, no pupae and only 22 empty cases being found. 

 This year it was worked on 9th and 10th September, when 130 pupae, but only 15 

 empty cases, were taken. The small number of cases shows that it had not previously 

 been a favoured breeding ground. The pupation period at this time was about 



