130 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 14 



Table II. — Samples of Mixed Infection by Years 



Samples ot Total Samples 



Year mixed infection received 



1911 1 1042 



1916 2 374 



1917 1 449 



1918 2 429 



1919 18 693 , 



1920 14 698 



1905-1920 38 7568 



This marked apparent increase in cases of mixed infection carries 

 the subject over from one of scientific interest to one of practical im- 

 portance. As is shown in Table III, the 38 samples of mixed infection 

 have come from 24 counties in thirteen states, most of these located in 

 prominent beekeeping regions. In eleven of these thirteen states both 

 European foulbrood and American foulbrood as shown by samples of 

 disease received in the laboratory for diagnosis are prevalent and of 

 long standing. There are only about three or four other states where 

 both diseases have been foimd in quantity from which samples of mixed 

 infection have not been received, while only from two states of the 

 many where the diseases are only occasionally bad have such samples 

 been received. 



Table III. — Samples of Mixed Infection by States and Counties 



state 



California 



Connecticut 



Indiana 



Iowa 



Kansas 



Michigan 



Mississippi 



Missouri 



New York 



Ohio 



Pennsylvania 



Wisconsin 



Washington 



Statistics obtained from the sample records, however, are not entirely 

 conclusive since a majority of the samples come to the laboratory 

 unsolicited. If a careful survey could be made of the regions where the 

 brood diseases are bad and widespread, probably many more such cases 

 would come to light. 



