The best way to “remember” some rare butterfly or other insect type which you may examiine in a distant collection is to possess a good upper and under side photograph of it. Clearly taken pictures never deceive and they make later identification relatively simple. It costs time and money to travel around the country and inspect types in the various museums and for this reason it is well to “bring home” at the time a lasting reference, especially if the procedure of taking the pictures is easy and inexpensively worth while. Nowadays any entomological specialist of repute must know what neighboring names stand for before he can apply new ones and for this reason, and in order to write strictly modern descriptions of comparative nature, a photograph of related objects is the best mental guide to have in lieu of actual specimens.