ig8 Indian Museum Notes [Vol. V. 



The bank near the Fort Station. 



I he bank near the Government Store, Beira. 



Dhobies' Island. 



Banks near the Station. 



Banks near the Norris Canal. 



The banks of Captains Garden. 



The banks of St. Joseph's College. 



The banks of the Police Quarters. 



Figure X shows the appearance of the lake close to the Govern- 

 ment Store, Beira, and which was not merely a h:>me for the eggs but 

 which smelt very badly indeed. 



Figure XI shows Dhobies' island, the banks of which and of the 

 neighbouring mud-banks produce weeds on which the eggs were 

 easily found. Portions of the water of Dhobies' island, particularly 

 near the large clump of trees just seen in the photograph, were bad 

 smelling. 



Figure XII shows the bridge and the wall of the bank in the 

 neighbourhood of the Norris Canal, where eggs were found. The 

 Canal itself contains a large quantity of weeds, but the boat was not 

 able to proceed far enough up the entry of the Canal for me to make 

 the necessary observations ; but judging from the stream at Polwatte, 

 I consider this a very likely place for eggs, larvae, etc. 



Figure XIII shows the bank near St, Joseph's College where eggs 

 were found. 



The above photographs depict typical spots, both clean and dirty, 

 where the larvae were found attached to weeds growing out of the 

 water, and to the brick walls. 



But the Lake proper is not the only place where the larvae, etc., 

 are to be found, for the little stream near the Polwatte lines had an 

 abundance of larvae, pupae, and flies. 



Nor are the flies merely to be found in the waters of streams 

 close to the Lake, for I have found eggs in the uncemented part of 

 Norris Canal, just by the Principal Civil Medical Officer's Office in 

 Borella. 



I have not found the eggs in the waters of Victoria park. 



Neither did I find any eggs on the slag which is tipped from the 

 Engine Yard into the lake near the Railway Station. This might, 

 however, be because the slag was comparatively fresh. 



4. THE PREVENTION. 



Every animal when placed in advantageous circumstances grows 

 and flourishes and increases in numbers. In order that a specie 



