Erratum.
The first part of reference 7 of "Prevention of oviposition in the housefly through tarsal contact agents," by K. R. S. Ascher [Science 125, 938 (10 May 1957)] should read "CDC Summary of investigations, January-June 1955" (U.S. Public Health Service Communicable Disease Center, Atlanta, Ga.), No. 8, p. 43."