1. Borden, E. C., R. E. Shope, andF. A. Murphy: Physicochemical and morhpologioal relationships of some arthropod-borne viruses to bluetongue virus-a new taxonomic group. Physicochemical and serological studies. J. gen. Virol.13, 261?271 (1971).
2. Chalmers, G. A., H. N.Vance, and G. J.Mitchell: An outbreak of epizootic haemorrhagic disease in wild ungulates in Alberta. Wildl. Dis.42, WD-64-15 (1964).
3. Du Toit, R. M.: The transmission of blue-tongue and horse-sickness byCulicoides. Onderstepoort J. vet. Sci. Anim. Ind.19, 7?16 (1944).
4. Fay, L. D., A. P. Boyce, andW. G. Youatt: An epizootic in deer in Michigan. Trans. N. Amer. Wildl. Conf.21, 173?184 (1956).
5. Foote, R. H., and H. D.Pratt: TheCulicoides of the Eastern United States. U.S. Dept. Health, Education and Welfare. Public Health Monograh No.18 (1954).