Upon completing the Translation of this 'Manual,' it is incumbent upon me to thank the press generally for the very favourable reception it has obtained throughout its progress. It was undertaken with the view to contribute to the advancement of the study of Entomology, by giving a wider circulation to its elementary principles; and it is hoped that its interesting details will tend to diffuse a taste for its more general cultivation.
Amidst a multitude of original experiments and observations, in addition to its numerous other scientific claims, this work will be found to comprise, in its anatomical and physiological departments, a generalisation of the host of facts elicited by the laborious investigations of Straus Durckheim, Muller, Suckow, Leon Dufour, Nitzsch, &c. &c., up to a very late period. It is confidently helieved, that a book combining the researches of such eminent men must necessarily become extremely useful, not only to the entomological but also to the physiological student, and to the scientific man in general.
The advantages to be derived from the study of natural history are manifest.