When you have collected a Number of _Caterpillars_, and remark’d the Food you found them on, put them into Boxes, which prepare as follows: Take a Deal or Wainscot Box, cut a large Square out of the Top and Bottom, cover the Place cut out with a Piece of Crape Hatband, glewing the same all round to prevent any Escape. This done, put your _Caterpillars_ into the Box, with some of the same Food you found them on, giving them, if you can, fresh every Day. Here you’ll find them feed and thrive; and after changing their Skins (some five and some six Times) they will go into the _Aurelia_ State, and there remain for a certain Time, some much longer than others; but in about fourteen Days from this last change you may look into your Boxes, to see if you have any _Flies_ bred; remembring that out of such as are produced in this manner, much more perfect _Flies_ may be chosen, than any that can be caught; and as several Sorts of _Caterpillars_ go down into the Earth, and there change to _Chrysalis_, some Earth must be put into the Boxes for that Purpose, at least two or three Inches deep. Never take the _Chrysalides_ out of the Earth, nor disturb them till the _Flies_ are bred. There is yet another Thing proper to be known, in order to compleat your Collection. A great Number of _Caterpillars_ go into the Earth, and there change to _Aureliæ_, whose _Moths_ are seldom upon the Wing till Night; these _Aureliæ_ are to be got by digging with such a Trowel as the _Bricklayers_ use, about the Roots of Trees, such as _Oaks_, _Elms_, _Limes_, _Poplars_, _Willows_, &c. also by the Sides of Walls and Pales. The usual Time to dig for them is from _September_ to _March_. When you have obtain’d a Number of _Aureliæ_ by digging, you must provide for them thus: Get some Earth and scowering Sand, mix them well together, and put the Mixture into some large Garden Pots; lay your _Aureliæ_ thereon, covering them with Moss; then sew a Piece of Crape Hatband round a small Hoop, and put such a Cover on each Pot, in order to receive the _Flies_ when bred, which will usually be in the Months of _March_, _April_, _May_, and _June_. I have always kept my Pots of _Aureliæ_ out in the open Air, and the _Flies_ have been produced with great Success; however it may be proper to place a Piece of Board over each Pot, to prevent unforeseen Accidents. Those who think proper to put these Directions in Practice, will, I am convinced, in a short Time, be possessed of a great Number of valuable _Flies_. What Food the _Caterpillars_ mentioned in this Work chuse to feed on, the Time when they change into _Aureliæ_, and when they issue forth in the _Fly_ State, may be seen in the Description of each Plate. ERRATA. Page. Num. Read. Instead of