256 TROPICAL MEDICINE AND HYGIENE 



breeding-places will result in the freedom of that house 

 from these mosquitoes. 



The places to look for breeding-places of S. fasciata 

 are : 



(1) The back of servants' quarters, as behind these 

 empty tins, bottles, and broken crockery of all kinds are 

 allowed to accumulate. If there is long grass these 

 receptacles are hidden by it, and thus, sheltered from the 

 sun, retain water for a long time. 



(2) Tanks, barrels, water-butts, used for collecting 

 or storing water. The largest as well as the smallest 

 are common breeding-places. Wooden receptacles are 

 perhaps the most likely to harbour the larvae. The 

 warning that any incautious movement is to be avoided 

 in examining such places must be remembered, as the 

 larvae, if they are not on the surface, cannot be seen. 

 Badly graded gutters are also fertile breeding-places. 

 The ordinary roof-gutter is apt to sag, and even if 

 properly graded is liable to be blocked by leaves and 

 other debris, so that pools, permanent in the wet season, 

 are formed. Moreover, eggs deposited on their extensive 

 surface are carried down into the water-tanks and there 

 develop. Some authorities condemn roof-gutters for 

 these reasons, but there is no reason why roof-gutters 

 should not be properly graded and kept clean, and it is 

 of little importance that eggs are washed down if the 

 mosquitoes that develop in the tank cannot escape 

 from it. More frequent openings in such gutters are 

 advisable. 



(3) In houses, bath-tubs, vessels for holding flowers, 

 flower-pots, even filters, such as the drip stone filters, 

 water-coolers, and every receptacle for water will serve 

 as a breeding-place. These are frequently found in 

 unoccupied rooms. As these mosquitoes can breed in 

 foul water, they may be present in the receptacles for 

 kitchen refuse, and even cesspits. Stable cesspits, stable 

 buckets and drains are often the breeding-places of these 

 mosquitoes. 



