Mar., 1917] Distribution of Warble Flies in Ohio 



171 



Before entering upon a detailed discussion of the distribution 

 of each species, a word concerning the distribution of the warble 

 flics in this and other countries may be of interest. 



• Hypoderma bovis found. 



■ Hypoderma lineata found. 



■*■ Herds reported free. 



Numbers — Herds reported infested. 



In the early entomological notes and observations, the 

 bot fly of the United States was commonly referred to as H. 

 bovis De Geer. In 1891, Dr. Curtice (Journal Comparative 

 Medicine and Veterinary Archives, Vol. XII, pp. 265-274, 

 June 1891) became convinced that the American species was 

 H. lineata DeVilliers and not H. bovis, while Riley (Insect Life, 

 Vol. 4, No. 9 and 10, 1892) after careful examination of all the 



