First published in 1914 as part of the Cambridge Public Health series and as a second edition of a 1913 original, this book examines how flies that do not suck blood can still transmit diseases from host to host. Graham-Smith examines the life histories and habits of various species of fly that are common in the United Kingdom as well as further afield, and suggests methods to prevent and control the fly population. The text is richly annotated with photographs, illustrations and charts, and will be of value to anyone with an interest in disease prevention and the history of public health.