bath and drain off all the alcohol you can by blotting gently with absorbent paper. Examine the specimen. If thin-skinned, it may have shrunk a little, so that the pins will have to be adjusted. Any alteration in pos- ture must be made at this time. The specimen will be too stiff tomorrow. Place the chip with its spider in a dish of 95% alcohol. After 24 hours the spider will be so rigid that you can safely remove all the pins but the few needed to fasten it to the wood. If those pins are short, the amount of liquid required to float the prepa- rations will be materially reduced. Make sure there is no free alcohol clinging to the specimen, and transfer it to carbol-xylene. Unless the last trace of water is removed at this point, the specimen is likely to wrinkle when it dries, so leave it until it is perfectly clear, as near to transparent as its coloring will permit it to become. Then transfer to xylol, and rinse for 24 hours. Unpin the specimen from the chip, drain it thor- oughly, and set it in a warm, airy place to dry. If, in life, it was dark colored and hairy, like the jumping spiders, it will now be finished, ready to be glued into its place in the exhibit. If, like the crab-spiders, it was naked and brightly colored when alive, tint it with oil colors and allow it to dry for several days before fastening it into its permanent position. This method of dry mounting can be applied, with greater or less success, to immature and adult insects, including the difficult hairy kinds, and to spiders, scorpions, phalangids, myriapods, and kindred crea- tures. It is more successful with tough, leathery species than with thin-skinned fleshy ones. The opacity which it imparts to naturally transluscent forms is a major drawback which can only occasion- ally be overcome by soaking the dried specimen in shellac or in a solution of paraffin in xylol. Species of which it is not possible to produce satisfactory dry specimens for exhibition are best represented by life-size or enlarged models. If carefully made in the likeness of the living creatures, these are more lively in appearance than dry mummies, however painstakingly prepared. 13