Large and small skulls should not be strung on the same wire. If, for example, squirrel and mouse skulls are strung together, the smaller certainly will be more or less broken. Above all, do not allow skulls to become fly blown. This is apt to occur when they are hung up to dry and while soaking, as some will float and thus be exposed to flies. Maggots do a great deal of damage by discoloring the bone, loosening the sutures, and obliterating data on tags. Never hang skulls in the sun -- always in the shade and, if possible, where there is a breeze. When skulls are quickly dried, any fly eggs deposited will not hatch. If, due to damp weather, the skulls are apt to remain soggy, wrap in cheesecloth (when hung up) to exclude the flies. When packing skulls for shipment, or when moving camp, use a container with plenty of air holes. Never put damp or even dry skulls in air tight containers; this causes sweating and maceration. When preparing skeletons, skin the body complete- ly, which means to the tip of the tail and to the claws of the feet. The pads of the feet of mammals and tarsi of birds are nearly impervious to the dermestid beetles. Always "draw" the animal and cut off all large muscles. Tag skeletons (each separate piece) in the same way as skulls. When roughed out, skeletons should be wrapped with thread or string so that the head and extremi- ties will not be broken off when they are dry and brittle. The legs are pulled up along the body and the head brought back. A few wrappings of thread will suffice for small skeletons. Do not use so much thread that the beetles have difficulty in getting to the meat. Do not wrap too tightly, as fresh bones are easily bent. Preserve amphibians, reptiles, young of birds and mammals, and materials of like nature, in formalin. Ordinarily mix one part full strength (40%) formalin