200 



Arthropods as Hosts of Pathogenic Protozoa 



"While yellow fever is a communicable disease, it is not con- 

 tagious in the ordinary acceptance of the term, but is spread by the 

 infection of places and articles of bedding, clothing, and furniture." 



Based upon this theory, houses, baggage, freight, even mail, 

 were disinfected, and the most rigid quarantine regulations were 

 enforced. The hardships to which people of the stricken regions 

 were subjected and the financial losses are incalculable. And withal, 

 the only efficient check upon the disease seemed to be the heavy frosts. 



133. Culex sollicitans. Female (*4). After Howard. 



It was found that for some reason, the epidemic abated with cold 

 weather, a measure beyond human control. 



It is not strange that among the multitude of theories advanced to 

 explain the cause and method of dissemination of the disease there 

 should be suggestions that yellow fever was transmitted by the 

 mosquito. We have seen that Beauperthuy (1855) clearly urged 

 this theory. 



More detailed, and of the greatest influence in the final solution 

 of the problem were the arguments of Dr. Carlos Finlay, of Havana. 

 In 1 88 1, in a paper presented before the "Rea Academia de Ciencias 

 M&licas, Fisicis y Naturales de la Habana," he said: 



