1903 



ENTOMOLOGICAL SOCIETY. 



^9 



a true air-breather is easily destroyed by a film of kerosene oil on the surface of the water that 

 it inhabits ; the eggs (Fig. 3) are laid singly in standing water. This species is tropical or 



Fig. 2. The Yellow-fever Mosquito. {Culex [Stegiimiria Jasciuta] ceniatu)< or fat:clat us. )- 



Fig. 3. Egns of Yellow-fever Mnstiuito in natural position on Grass-steijis.* 



subtropical in its range, being only found between the latitudes of oS"^ north and south and at 

 low altitudes ; throughout this region it is nectssary that any perr^on affected with the fever 

 should be absolutely protected from the mosquitoes, as by this means the spread of the di.sease 

 will be prevented. No other form of (juarantine is necessary ; no one is liable to contract the 

 disease unless he is bitten by a mo.squito which has previously bitren a yellow fever j atient. 



These illustrations are yiven by kind permission of The Century Co., New York. 



