go 



3. Place a plug of cotton wool in the mouth of 

 the tube. 



4. Transfer to the large bottle by placing the 

 tube over the mouth of the bottle and withdrawing 

 carefully the cotton wool. Keep the bottle closed 

 with a plug of cotton wool. 



To BREED OUT MOSQUITOES 



(Fig. 34) 



Collect a number of full-grown larvae and nymphae 

 of both Ano'phelines and Culicines. 



1. Separate the nymphae from the larvae and 

 place them in a jar or wide-mouthed bottle half-full 

 of water, leaving room for the insects when hatched. 

 Cover the jar with a piece of thick cardboard or a lid, 

 the central portion of which is replaced by mosquito 

 netting. 



2. Place the larvae where they will receive 

 plenty of light, but will not be subject to great heat. 



3. Remove the nymphae as they are seen at the 

 end of each day. 



To KEEP MOSQUITOES ALIVE 



The length of time mosquitoes remain alive in 

 captivity depends almost entirely upon the suitability 

 of the conditions under which they are kept. 



N.B. Except for special purposes, mosquitoes (especially Anophe- 

 lines) should not be kept in cages, i.e., frames covered with mosquito 

 netting, as the mortality is immense. 



Procure several ( chutney jars ' with hollow glass 

 stoppers. This form of jar is very convenient, but 

 any other jar will serve. 



Cut a piece of thick cardboard so that it will, 

 when forced down into the jar, remain supported 

 on the shoulders of the jar. 



