Reports A Male-Producing Strain of the House Fly Ian C. McDonald1 1Agricultural Research Service, U.S. Department of Agriculture, Fargo, North Dakota 58102 See allHide authors and affiliations Science 30 Apr 1971:Vol. 172, Issue 3982, pp. 489DOI: 10.1126/science.172.3982.489 Ian C. McDonald 1Agricultural Research Service, U.S. Department of Agriculture, Fargo, North Dakota 58102Find this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF Abstract An autosome inherited by male offspring only and a temperature-sensitive lethal factor have been combined in a house fly strain which produces both male and female progeny when reared at 25.6°C but only male progeny when reared at 33.3°C.