In an era before DDT and modern insecticides, the humble house fly was a killer. This 1924 USDA bulletin documents the desperate early twentieth-century public health battle against a insect that transmitted typhoid, cholera, and dysentery across American communities. Leland O. Howard, the USDA's chief entomologist, writes with urgency befitting a wartime campaign: he maps the fly's biology, reveals its breeding grounds in manure piles and garbage, and prescribes an arsenal of screens, traps, poisons, and most importantly, sanitation as the only viable defense. The text reads like a dispatch from the front lines of domestic health, advocating for community-wide efforts to deny flies their breeding sites. For readers interested in the history of public health, pre-chemical pest control, or the everyday anxieties of early modern life, this bulletin offers a remarkable window into a world where swatting a fly was an act of survival.
