H. i. irritans host location in relation to various environmental 

 factors was investigated. No significant differences were shown 

 between the success of newly emerged and day-old flies in locat- 

 ing hosts or between males and females of either age. In weather 

 conditions, horn fly dispersal and subsequent host location ap- 

 peared to be random with respect to predominant wind direction. 

 Directional movements, however, were influenced by tempera- 

 ture, wind velocity, and humidity. There was a strong tendency 

 for both parous and nulliparous flies to transfer from one host to 

 another. 



194. Kirkwood, A. C, and D. W. Tarry. 1973. A survey of some 



species of flies associated with cattle. Int. Pest Control 15(5) : 

 6-10. 



H. i. irritans was among various species of flies caught on and 

 near a tethered calf in Surrey, England. 



195. Knapp, F. W. 1972. Prevention of cattle grub infestation in 



lactating dairy cows by use of daily applications of crotoxyphos. 

 J. Econ. Entomol. 65(2) : 466-467. 



196. 1972. Evaluation of dust bags for horn fly control on 



cattle. J. Econ. Entomol. 65(2): 470-472. 



Information on self-dusting stations and the efficacy of several 

 different insecticides was presented. Dusts tested included 3 per- 

 cent and 5 percent stirofos, 5 percent coumaphos, 3 percent 

 malathion, 5 percent ronnel, 5 percent fenthion, and 3 percent 

 crotoxyphos. 



197. Knipling, E. F. 1959. The use of DDT in veterinary medicine. 



In S.W. Simmons (ed.) . DDT, the Insecticide Dichlorodiphenyl- 

 trichloroethane and Its Significance, vol. 2, Basel, pp. 522-528. 



198. 1972. Integrated control of livestock insect pests, pp. 



379-397. In Khan, M. A., and W. 0. Haufe. (ed.) Toxicology, 

 Biodegradation, and Efficacy of Livestock Pesticides. Proceedings 

 of an Advanced Study Institute on Toxicity of Pesticides Used 

 on Livestock Sponsored by the North Atlantic Treaty Organiza- 

 tion and organized by the Research Station, Can. Dep. Agric. 

 Lethbridge, Alberta. Amsterdam. 434 pp. 



Discussed possibility of elimination of horn fly in North 

 America. 



199. Koe, F-H. 1975. Preliminary observation on the species con- 



stitution and the seasonal fluctuations of synanthropic flies in the 

 plain rural region of Honan province China. (In Chinese.) 

 Acta Entomol. Sin. 18(1): 71-76. 



200. Kramer, H. 1917. Die musciden der oberlausitz. Abhandlungen 



Naturforschenden Gesellschaft, Gorlitz 28: 289. 



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