THE PENRYN CRUSADE 105 



mately eight square miles. This means that the 

 campaign cost Penryn about forty cents a day per 

 square mile of protection. Where there are only ten 

 families to a square mile the protection afforded would 

 cost approximately four cents a day per family, and 

 yet one man was required to bear more than half the 

 total cost of the crusade. 



Local Occurrence of Anopheles. — The first careful 

 field inspection in the vicinity of Penryn and Loomis 

 was made January 14 and 15, 1910. At that time 

 no wrigglers of any kind were discovered. Occasionally 

 adult mosquitoes were reported occurring in houses 

 during January. On February 11 and 12, balmy 

 spring days, Anopheles mosquitoes were flying about 

 abundantly during the daytime, and few persons, if 

 any, escaped being bitten. Six specimens were taken 

 in the office of the Penryn Fruit Company in a very 

 few minutes. The school-teacher at Newcastle re- 

 ported swarms of mosquitoes emerging from beneath 

 the schoolhouse. 



All these mosquitoes, and none other than Anopheles 

 could be found, were coming forth from their winter 

 quarters, i.e. had been in hibernation, consequently 

 were hungry and were actively in search of blood 

 during the daytime. In a few days this day flying 

 ceased. 



A careful search was made on these dates for Anoph- 

 eles wrigglers, but none was found, although Culicine 

 larvae were abundant. The first Anopheles wrigglers 



