

COMPARISON OF THE RELATIVE FREQUENCY OF GENUS ANOPHELES AND GENus CULEX COLLECTED ALONG THE AAPIES RIVER, PRETORIA. 1901-1902. 
“DECEMBER JANUARY FEBRUARY MARCH APRIL 



















































































































































































































































































































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PERE ses a” A AE ME ACEP 
Culex ane ... Anopheles 

Prepared by Dr. Theiler, Pretoria. 
