CHAP. III. The _Caterpillars_ of this Chapter have two Feet and two Holders, with six Hooks or Claws; but have no Feet in the Middle Part of their Bodies like those already described. Their progressive Motion is performed by fixing the Head-part, and drawing up the Tail to it; so that each Step, forming a Loop, they are called LOOPERS. They are provided with strong and sharp Claws in their Holders, by which they can fasten themselves in such manner as to support the Rest of their Bodies, either perpendicularly or horizontally, or in any other Posture they please, without any regard to the Center of Gravity in their respective Bodies. They are able likewise, out of their own _Viscera_ or Bowels, to furnish themselves with Lines, whereby they can let themselves down from the Branches of Trees, or other Heights, as they find Occasion. CLASS I. Smooth _or_ naked Loopers. SECT. a. _Having no_ Protuberances. L. 1. CH. 3. I. CL. 1. S. a. 1. The BRINDLED BEAUTY MOTH. The _Caterpillar_ will feed on most Fruit-trees, as also on the _Willow_, _&c._ Its _Chrysalis_ is formed within the Earth towards the End of _June_, and the _Moth_ comes forth in _April_. I have taken Plenty of them sticking on the Barks of the _Willow_ Trees about the Water-works at _Chelsea_. See _Merian_, Vol. 1. P. 75. Chap. 37. _Albin_, Pl. 39. The Honey-Cherry. _Cerasus, sylvestris, septentrionalis, fructu rubro parvo serotino_. Raii. Syn. L. 1. CH. 3. II. CL. 1. S. a. 2. The JULY ARRACH MOTH. The _Caterpillar_ may be found, full fed, on the _wild Arrach_, about the Middle of _September_; at which Time it changes to a _Chrysalis_ in the Earth: The _Moth_ is bred in _July_, and may be taken in an Evening in and near the Gardens about _Vauxhall_ and other Places. See _Albin_, Pl. 47. The Black Curran-Tree. _Ribes nigrum vulgo dictum, folio olente._ I. B. L. 1. CH. 3. III. CL. 1. S. a. 3. The MOTTLED UMBER-MOTH. The _Caterpillar_ feeds on Fruit-Trees, _Oak_, _Elm_, _Black-Thorn_, _&c._ and turns to a _Chrysalis_, within the Earth, about the Middle of _May_. The _Moth_ comes forth in _October_, and may be found at that Time sticking on the Bark of Trees in Parks, _&c._ See _Albin_, P. 100. The Apricock-Plumb. _Prunus fructu parvo præcoci._ Tourn. L. 1. CH. 3. IV. CL. 1. S. a. 4.