DESCRIPTION OF THE WINGATE FLY CHART 89 TABLE OF WING CELLS AND VEINS 93 GLOSSARY INDEX OF TERMS USED 94 ALPHABETICAL LIST OF SIXTY FAMILIES 95 NUMBERED LIST OF FAMILIES WITH DESCRIPTIVE NOTES AND REFERENCES 108 ANALYTICAL TABLE OF FAMILIES 113 ILLUSTRATIONS PAGE Fig. 1. THE HOUSE-FLY, FEMALE, _Enlarged_ 6 Fig. 2. THE LESSER HOUSE-FLY, MALE, _Enlarged_ 6 Fig. 2a. THE STABLE-FLY, FEMALE, _Enlarged_ 6 Fig. 3. WING PATTERNS CONTRASTED 12 Fig. 5. METAMORPHOSIS; LARVA, INSTAR, IMAGO 39 Fig. 6. APPARATUS FOR THE BREEDING OF GENTLES 81 THE WINGATE FLY CHART (APPENDIX) Plate I. EXTERNAL PARTS AND CHARACTERS, NAMED 88 Plate II. ANTENNÆ, MANY-JOINTED TYPES 97 Plate III. ANTENNÆ, THREE OR FEW-JOINTED TYPES 99 Plate IV. WINGS, TYPE-FORMS OF NEMOCERA 101 Plate V. WINGS, OTHER TYPE-FORMS 103 Plate VI. DETAILS OF SPECIAL CHARACTERISTICS, ETC. 105 Plate VII. DITTO 107 NOTE. Fig. 4 has been found to be not available for this edition. ------------------------------------------------------------------------ PREFACE The dangers of house-flies to the health of the community have come into such recent prominence that the appearance of Major Hurlstone Hardy's book should fill a want. It is written lucidly and clearly, yet in that popular style which is so frequently lacking in scientific works. This is a great advantage. Too often scientists are prone to bring out works couched in terms which cannot be understood by an interested public that is not versed in technical terms. Thus matter which is of the greatest general importance is passed unread by many, and is, in consequence, not acted upon. Major Hardy has a knowledge of these deadly insects which, in my opinion, is unsurpassed, because he has the personal experience of practical experiment combined with the instincts of the naturalist. The result is an account both accurate and interesting which should prove of the greatest value.