First published in 1921, this book is the second of a three-part study on Diptera, or two-winged flies. Pearce includes advice on the capture and study of entomological samples, and the majority of the volume is made up of detailed photos of various species of two-winged flies, both male and female, as well as the eggs and habitats of certain breeds. This book will be of value to anyone with an interest in scientific photography or the history of entomology.