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The Ohio Journal of Science [Vol. XVII, No. 5, 



in southeastern Ohio. If reports of the occurrence of warble 

 fly grubs not accompanied by specimens are included, then the 

 number of counties infested reach 57; 8 additional counties in 

 northeastern, 5 in northwestern, 1 in southwestern and 9 in 

 southeastern Ohio. 



Counties in Which Collections or Reports Were Made. 



Numbers of each. 



The localities within these counties from which specimens 

 were obtained were 20 in northeastern, 2 in southeastern, 15 

 in southwestern and 11 in northwestern Ohio — a total of 48 

 separate points or farms. If the reports not accompanied by 

 specimens are included, then 44 additional localities in north- 

 eastern, 16 in northwestern, 16 in southwestern, and 12 in 

 southeastern Ohio may be added — making a total of 136 herds 

 or farms infested with ox warble flies. 



Early in the investigations the two species of warble flies 

 (H. bovis and H. lineata) were recognized. Contrary to 

 expectation, H. bovis was much more abundant. The number 

 of representatives of H. bovis was 404, or 83.5 per cent of the 

 total collection. 



