[34] Miall’s Injurious and Useful Insects (Bell), and Natural History of Aquatic Insects (Macmillan), are strongly recommended as guides to further work. [35] Living specimens may be obtained from Mr. T. Bolton, 25 Balsall Heath Road, Birmingham. [36] Greek, kephalon, a head. [37] See footnote, p. 372. [38] Parker and Haswell’s Text-book of Zoology (Macmillan). [39] Darwin’s Vegetable Mould and Earthworms (Murray). [40] No attempt has been made to compile a complete calendar, the events noticed being those only which are considered in this book. Transcriber's Notes: The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate. The scale provided with many of the illustrations is as printed in the original book and is included for completeness. In this ebook version, the scale of the image displayed may not match the original. Typographical errors have been silently corrected.