3. Three and a half feet of heavy wire. (No. 3 galvanized is the thing.) 4. A piece of cheese cloth, three fourths of a yard. (Get a good grade to stand a season's wear.) Almost every boy knows a tinsmith and when it comes to putting these materials together, the services of a skilled workman are very valuable. If pocket money is scarce, there are any number of jobs a boy can do for the tinsmith in exchange for his help in making the net. That piece of wire is to form the ring which holds the cheese cloth bag; the ring must be fastened securely into the end of the handle. Bend the wire into a circle a foot in diameter, then bend back three inches of both ends and force them into the end of the handle, a hole for the purpose first having been made by burning or boring. Bend the tin round the handle at the net end to keep it from splitting when in use, and tack it on tight. [Illustration: Insect net] If you know how to sew you are more fortunate than most of the boys I know, although why should not a boy learn to use a sewing machine? The bag ought to be sewed on the machine. You must first lay the finished edge or selvedge around the wire to make sure that it goes around and has a little extra for the seam. Pin the cloth together where it meets around the wire, then lay it on a table, double. Cut the bag, rounding the bottom neatly. Cheese cloth is the worst stuff to ravel, and if you sew the bag with a single seam you will soon be sorry. Pin the cloth so that the two edges are exactly together and sew a seam about a quarter of an inch wide all the way round. Now turn the bag inside out and fold it so that the seam you just made will be right on the edge. Sew another seam, three eighths of an inch deep this time. The ragged edge of the goods will now be inside of this second seam and can not fray out and make a nuisance of itself. If all this is worse than Dutch to you, take the bag to your sister. She is not so much cleverer than you but the chances are that if you ask her to sew you a French seam, she will make it just as I have described. Sew the finished bag onto the wire with heavy double thread and your net is ready for use. Materials to make a killing bottle: 1. A wide-mouthed bottle. (I advise every collector to have two bottles, one to carry in the pocket all the time, the other for special trips for large things. For the first a small olive oil bottle, a test tube, or any convenient sized bottle with a mouth nearly or quite as large as the body of the bottle. A fruit jar, pint size, does well for the very large things.) 2. A cork which fits the bottle tightly, and is an inch long. A cork any shorter than this is an aggravation as it is so unhandy.