First published in 1914, this book was written as an exploration into the role of biting flies in the transmission of disease. Attention is focused on the modes of life occupied by the insects, the means by which infections are transmitted, and preventative measures through which infection could be avoided. The text is designed to bridge the gap between entomological and medical areas, allowing for a pragmatic approach to disease prevention that acknowledges the interdependence of fields. As far as possible, the description of an infection will immediately follow that of the family concerned with its transmission. Written as the companion volume to Non-bloodsucking Flies, this is an illuminating book that will be of value to anyone with an interest in entomological studies and the history of medicine.