210. M. R. Graham, B. F. Hogan, and J. L. Eschle. 1974. 



Effect of releases of sterile horn flies into a native population of 

 horn flies. Environ. Entomol. 3(1): 159-162. 



Low numbers of 137Cs irradiated H. i. irritans released into a 

 native population had no effect despite preliminary treatments 

 with insecticide. Larger releases caused a downward trend in 

 reproduction and resulted in about 90 percent control during the 

 latter part of the study. 



211. B. F. Hogan, R. R. Blume, and J. L. Eschle. 1972. Some 



bionomical aspects of horn fly populations in central Texas. En- 

 viron. Entomol. 1(5): 565-568. 



Oviposition during October and November was responsible for 

 the spring buildup of flies on cattle during April and May. The 

 average 0.14 flies/pat that emerged from the subsequent over- 

 wintering pupae produced an Fi generation that averaged 1.2 

 flies/pat. The average monthly rate of production from May to 

 October was 6.6 horn flies/pat when competition from other 

 arthropods was allowed, compared with 66.8/pat when competi- 

 tion was essentially eliminated. 



212. LaChance, L. E. 1974. Status of the sterile-insect release method 



in the world. In The Sterile-Insect Technique and Its Field Ap- 

 plications. Proceedings of a panel on the practical use of the 

 sterile-male technique for insect control. FAO/IAEA, Vienna, 

 1972. pp. 55-62. 



213. Laurence, B. R. 1953. Some diptera bred from cow dung. En- 



tomol. Mon. Mag. 89: 282. 



Lyperosia (= Haematobia) irritans reared from cow dung in 

 Harpenden, Herts, England. 



214. Leese, A. S. 1909. Experiments regarding the natural transmis- 



sion of surra carried out at Mohand in 1908. J. Trop. Vet. Sci. 

 4: 108-132. 



Lyperosia {= Haematobia) and Haematobia (= Haemato- 

 bosca) were so scarce that they were believed not to have played 

 an important part in surra transmission. 



215. 1912. Biting flies and surra. J. Trop. Vet. Sci. 7: 19-34. 



Lyperosia (— Haematobia) minuta was believed involved in 



spread of surra among camels. 



216. Legner, E. F., and J. H. Poorbaugh. 1972. Biological control of 



vector and noxious synanthropic flies: a review. Calif. Vector 

 Views 19(11): 81-100. 



217. Leonard, M. D. 1928. A list of the insects of New York with a 



list of the spiders and certain allied groups. Cornell Univ. 

 Agric. Exp. Stn. Mem. 101. p. 828. 



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