"It was my fault," interposed Mr. Pettis. "He told me not to open the box, but I had shown them a dozen times to-day and they never moved. I didn't think about night being their time to fly. I am very sorry."

So was I. Sorry enough to have cried, but I tried my best to conceal it. Anyway, it might be Io, and I had that. On going inside to examine the moth, I found a large female Eacles Imperialis, with not a scale of down misplaced. Even by gas light I could see that the yellow of the living moth was a warm canary colour, and the lavender of the mounted specimen closer heliotrope on the living, for there were pinkish tints that had faded from the pinned moth.

She was heavy with eggs, and made no attempt to fly, so I closed the box and left her until the lights were out, and then removed the lid. Every opening was tightly screened, and as she had mated, I did not think she would fly. I hoped in the freedom of the Cabin she would not break her wings, and ruin herself for a study.

There was much comfort in the thought that I could secure her likeness; her eggs would be fertile, and I could raise a brood the coming season, in which would be both male and female. When life was over I could add her to my specimen case, for these are of the moths that do not eat, and live only a few days after depositing their eggs. So I went out and explained to Mr. Pettis what efforts I had made to secure this yellow moth, comforted him for allowing the male to escape by telling him I could raise all I wanted from the eggs of the female, showed him my entire collection, and sent him from the Cabin such a friend to my work, that it was he who brought me an oil-coated lark a few days later.

On rising early the next morning, I found my moth had deposited some eggs on the dining-room floor, before the conservatory doors, more on the heavy tapestry that covered them, and she was clinging to a velvet curtain at a library window, liberally dotting it with eggs, almost as yellow as her body. I turned a tumbler over those on the floor, pinned folds in the curtains, and as soon as the light was good, set up a camera and focused on a suitable location.

She climbed on my finger when it was held before her, and was carried, with no effort to fly, to the place I had selected, though Molly-Cotton walked close with a spread net, ready for the slightest impulse toward movement. But female moths seldom fly until they have finished egg depositing, and this one was transferred with no trouble to the spot on which I had focused. On the back wall of the Cabin, among some wild roses, she was placed on a log, and immediately raised her wings, and started for the shade of the vines. The picture made of her as she walked is beautiful. After I had secured several studies she was returned to the library curtain, where she resumed egg placing. These were not counted, but there, were at least three hundred at a rough guess.

I had thought her lovely in gas light, but day brought forth marvels and wonders. When a child, I used to gather cowslips in a bed of lush swale, beside a little creek at the foot of a big hill on our farm. At the summit was an old orchard, and in a brush-heap a brown thrush nested. From a red winter pearmain the singer poured out his own heart in song, and then reproduced the love ecstasy of every other bird of the orchard. That moth's wings were so exactly the warm though delicate yellow of the flowers I loved, that as I looked at it I could feel my bare feet sinking in the damp ooze, smell the fragrance of the buttercups, and hear again the ripple of the water and the mating exultation of the brown thrush.

In the name—Eacles Imperialis—there is no meaning or appropriateness to "Eacles"; "Imperialis"—of course, translates imperial—which seems most fitting, for the moth is close the size of Cecropia, and of truly royal beauty. We called it the Yellow Emperor. Her Imperial Golden Majesty had a wing sweep of six and a quarter inches. From the shoulders spreading in an irregular patch over front and back wings, most on the front, were markings of heliotrope, quite dark in colour: Near the costa of the front wings were two almost circular dots of slightly paler heliotrope, the one nearest the edge about half the size of the other. On the back wings, halfway from each edge, and half an inch from the marking at the base, was one round spot of the same colour. Beginning at the apex of the front pair, and running to half an inch from the lower edge, was a band of escalloped heliotrope. On the back pair this band began half an inch from the edge and ran straight across, so that at the outer curve of the wing it was an inch higher. The front wing surface and the space above this marking on the back were liberally sprinkled with little oblong touches of heliotrope; but from the curved line to the bases of the back pair, the colouring was pure canary yellow.

The top of the head was covered with long, silken hairs of heliotrope, then a band of yellow; the upper abdomen was strongly shaded with heliotrope almost to the extreme tip. The lower sides of the wings were yellow at the base, the spots showing through, but not the bands, and only the faintest touches of the mottling. The thorax and abdomen were yellow, and the legs heliotrope. The antennae were heliotrope, fine, threadlike, and closely pressed to the head. The eyes were smaller than those of Cecropia, and very close together.

Compared with Cecropia these moths were very easy to paint. Their markings were elaborate, but they could be followed accurately, and the ground work of colour was warm cowslip yellow. The only difficulty was to make the almost threadlike antennae show, and to blend the faint touches of heliotrope on the upper wings with the yellow.