very rare and beautiful insects. I will give here some account of two species of butterflies, which, though very common in collections, present us with peculiarities of the highest interest.
The first is the handsome Papilio memnon, a splendid butterfly of a deep-black color, dotted over with lines and groups of scales of a clear ashy blue. Its wings are five inches in
DIFFERENT FEMALES OF PAPILIO MEMNON.
expanse, and the hind wings are rounded, with scolloped edges. This applies to the males; but the females are very different, and vary so much that they were once supposed to form several distinct species. They may be divided into two groupsa those which resemble the male in shape, and those which differ entirely from him in the outline of the wings. The first vary much in color, being often nearly white, with dusky yellow and red markings, but such differences often oc-