Anopheles Propagation Areas 8i 



Seasonal changes must be also borne in mind. 

 The unexpected happens very frequently in this 

 class of work. 



Only a few of the negro laborers wore hip boots 

 for work in deep water. In the wet season the 

 sanitary inspectors dressed in khaki, heavy leather 

 shoes, and stiff pig-skin leggins. When heavy 

 showers fell unexpectedly it was impossible to 

 keep dry, and when bodies of water had to be 

 examined they waded into them, and let the hot 

 sun dry their clothing as it could. It was fortunate 

 that the inspectors' enthusiasm lasted longer than 

 their clothing ! They found being drenched to the 

 skin several times a day less fatiguing than wear- 

 ing surveyor's boots for work in lagoons having 

 soft mud bottoms. Boots would have been too 

 heavy for the amount of walking and work of a day 

 in such a hot and humid climate. The leggins were 

 essential for protection from thorns, spines, and the 

 red bugs that make life a misery to some. 



It is often stated that sewage and polluted 

 waters are favorable to the development of 

 Culex, and that Anopheles are not found in it. 

 This assertion did not hold true under the condi- 

 tions in Cuba and Panama. The farther from 

 the sewer outlet, the less will be the amount of 

 organic substance carried by the water, and a 



