35 



become exposed in other parts of the river and the swarms that 

 appear there breed locally. 



" Nimitti are by no means confined to Dongola Province, though 

 it is usually only there that they occur in very large numbers. 

 Larvae and pupse have been taken from the river at Abu Hamed 

 and at Gebel Umali, while adults are frequently seen during the 

 winter in the vicinity of the river from Abu Hamed to 

 Khartoum." 



