20 



MOSyi'ITO WOUK IN KIIAIITOIM AND IN THE ANaLO-EOYPTlAN SUDAN GENERALLT 



Invasion by 

 Aiiophclinrs 



tlif tornici'il liiinks ami saiul-liiiiiks of tlic lUiic Nile ulnivr tlic tdwii. 'I'lic iiiDscniito 

 lirigiidi' is St) siiiiill, tlli'iv is so iiiiiili to lie done, ami tlnic arc siuli few incaiis of 

 transit tliut it is liinicuit to control a large area, or ratliiT Uiigtliy strijis, oiitsidi- 

 the town l)oiiinlari(s. It nm be iloiu- and is done as far as the limiting White Nile 

 on the west, liut on the east side it is iiioic diDicult, and tluis it happens that 

 everv now and then poids or other water eollections escape inspeetiou, and inosijuitoes 

 are either driven into Khartoiiin hy the wind or lirought to it in boats and steamers. 

 Occasionally Anophelines have been found breeding out in leaky boats or on board steamers, 

 in water accumulations which are exposed to the light. As previously stated, they do not 

 breed in the bilges. At present, however, it is coiniiaratively easy to locate them in the tovm 



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Vu:. 6.- I'.".l.s r. Khm.i.' m, Id-sc i..<,;s \\rf l.riu'-.l l\ .i r.-iinUll c»t" In inrhi--v, .iini 'iiu- ii.ur.uurM iiiiinn'-^ u..r.ii,.:i - mk; 



persisted for over three weeks in October, 190,^. 



at an early period, and to cut sliurt tlicir career, but it would be a totally dift'erent business 

 if Khartoiini was studded with ponds and pools. The belief above expressed has quite 

 recently received remarkable l>ut nnwekorne confirmation. The fast of Ramadan was followed 

 by the feast of J?airam. The first lasteil four weeks, the latter one week. Hoth— and especially 

 Bnirani — interfere<l with the work of the brigade. The men worked badly .luring Ramailan, 

 M.ilariaout- they Would not work at all during Bairani. The liliie Nile was falling, and the pools 

 break amongst j,i,y„-n iu Figs. 7 and 8 (/'"'/' '22) formed in the sandbank above the British barracks. No 



Brilish troops , ri»4l- 



doubt the ('old weather which obtamed was the cause of a reerudeseeiice of a malaria attack in 



a solilier who had serveil in India and was resident in these barracks. Seven other eases 



(juickly occurred. Attention was directed to the pools, and /'i/irtophoms costalis was found 



