HAYES, RICHARD O.; DANIELS, JOAN B.; ANDERSON, KATHLEEN S.; PARSONS, MARGARET A.; MAXFIELD, HERBERT K.; LAMOTTE, LOUIS C.; HAYES RICHARD O.; From the Encephalitis Section, Technology Branch, Communicable Disease Center, Public Health Serviee, U. S. Department of Health, Education, and Welfare; DANIELS JOAN B.; Virus Section, Diagnostic Laboratories, Institute of Laboratories, Massachusetts Department of Public Health; ANDERSON KATHLEEN S.; ⁴Division of Communicable Diseases, Massachusetts Department of Public Health, Taunton, Mass.; PARSONS MARGARET A.; From the Encephalitis Section, Technology Branch, Communicable Disease Center, Public Health Serviee, U. S. Department of Health, Education, and Welfare; MAXFIELD HERBERT K.; From the Encephalitis Section, Technology Branch, Communicable Disease Center, Public Health Serviee, U. S. Department of Health, Education, and Welfare; LAMOTTE LOUIS C.; ⁵Encephakitia Section, Technology Branch, Communicable Disease Centre, Public Health Service, U.S. Department of Health, Education, and Welfare, Greeley, Colorado.