If any of the insect host is a proof of high art in nature, and of the beauty of the creator's thoughts, it is most assuredly the fair creature whose name is mentioned above. Allied to families whose members are among the greatest of the insect world, and having cousins and connections surpassing in size and beauty all others of their kingdom in this Dominion, still this moth is as pre-eminent above its fellows as is its namesake–the fair empress of the sky–above the lesser lights that rule the night.