The objective of this book is to summarize, as completely as possible, the large and varied literature on mosquitoes that pertains to their bionomics and relation to disease. For easy reference, this information is set forth systematically according to genus and species. My hope and expectation is that the compilation will provide a starting point for new research. It should relieve the investigator of the necessity for repeating research on points which have already been well proved and enable him to concentrate on questions which urgently require his attention. - Preface.