R. Her Grace the Duchess of Richmond. The Right Honourable the Lord Rolle. The Royal Society of London. S. The Right Honourable the Countess of Shaftsbury. The Right Honourable the Countess of Stamford. The Right Honourable the Lady Diana Spencer. The Right Honourable the Lady Elizabeth Spencer. The Right Honourable the Lady Smithson. Sir Francis St. John, Baronet. Sir Hans Sloane, Baronet. John Archer Shish, Esq; Mrs. Smith, at Oxford. T. The Right Honourable the Lord Trevor. The Honourable Mrs. Trevor. James Theobald, Esq; Doctor Christopher Jacob Trew, at Norimburg. The Honourable Mr. Talbot. James Tilson, Esq; Miss Tasburgh. W. The Honourable Mrs. Walter. Ralph Willett, Esq; Taylor White, Esq; Francis Whithead, Esq; Horace Walpole Esq; of Arlington-Street. Mr. William Wells. Mr. Wollaston. Mr. Woodhouse. Mr. Whittle. Mr. Ware. Y. The Honourable Mr. Yelverton, 3 Books. [Illustration:(Decorative Design)] [Illustration:(Decorative Header)] BOOK I. PART I. _The_ CATERPILLARS, _described in this Book, are such as produce Moths; of which, as there is a great Variety, ’twas thought proper to range them under the following Heads or Chapters._ CHAP. I. The CATERPILLARS belonging to this Chapter have six Hooks or Claws before, eight Feet in the middle, and some have, and some have not two Holders behind. Their Bodies are composed of twelve circular Joints, or Rings, conjoined by a common Membrane, which they are capable of contracting or expanding. When they would move along, they dilate the muscular Skin that separates the first Ring from the next; they advance the first Ring to a certain Distance, and then, by contracting and expanding the Skin of that Part, they move the second Ring: the same Method moves the Third, and so the whole Body marches in Succession: the Motion of their Feet and Claws corresponding with and assisting the progressive Motion of the Rings. _Vide Spectacle de la Nature, Dial._ I. The CATERPILLARS under this Head may likewise be divided into three Classes: I. NAKED or without HAIR. II. Having little HAIR. III. Having much HAIR. _The First_ CLASS, _or the_ NAKED _and without_ HAIR, _may be subdivided in the following Manner_. CLASS I. _Such_ CATERPILLARS _whose Bodies are_ SMOOTH. SECT. _A_. _Without_ Risings, _or_ Protuberances L. 1. CH. 1. I. CL. 1. S. _A_. 1.