Mosquitoes and Yellow Fever 135 



another great epidemic, for the people now know 

 how the disease is caused and the remedy. 



Not long since I had occasion to write to a 

 prominent entomologist in Louisiana for some 

 specimens of the yellow fever mosquito for labora- 

 tory work. The following extract from his reply 

 will show something of the work that is still being 

 done there. 



"I am afraid we cannot furnish specimens of Steg- 

 omyia, in spite of the fact that Louisiana is supposed 

 to be the most favorable home of this species in the 

 South. Since the light occurrence of yellow fever in 

 this State in 1905, a very vigorous war has been kept 

 up against Stegomyia, and the ordinances of all Louis- 

 iana cities and principal towns require the draining 

 of all breeding places of this mosquito and the constant 

 oiling or screening of all cisterns or other water con- 

 tainers. The result is this species is very rare. Here 

 in Baton Rouge I only see one once in a great while, 

 and it would require perhaps a good many days' work 

 at the present season to get as good specimens and as 

 many of them as you require." 



IN THE PANAMA CANAL ZONE 



Yellow fever was one of the worst obstacles that 

 confronted the French when they were attempting 

 to build the Panama Canal. The story of the 



