Moths of the Limberlost: A Book About Limberlost Cabin

by Gene Stratton-Porter

Two days later it stopped travelling, and pupated on the top of the now hardened earth in the bucket that contained the other two. It was the largest of the pupae when it emerged, a big shining greenish brown thing flattened and seeming as if it had been varnished. On the thin pupa case the wing shields and outlines of the head and different parts of the body could be seen. Then a pan of sand was baked, and a box with a glass cover was filled. I laid the pupa on top of the sand, and then dug up the first one, as I was afraid of the earth in which it lay. The case was sound, and in fine condition. All of these pupae lived and seemed perfect. Narrow antennae and abdominal formation marked the big one a female, while broader antlers and the clearly outlined 'claspers' proved the smaller ones males. A little sphagnum moss, that was dampened slightly every few days, was kept around them. The one that entered the ground had pushed the earth from it on all, sides at a depth of three inches, and hollowed an oval space the size of a medium hen egg, in which the pupa lay, but there was no trace of its cast skin. Those that pupated on the ground had left their skins at the thorax, and lay two inches from them. The horns came off with the skin, and the lining of the segments and the covering of the feet showed. At first the cast skins were green, but they soon turned a dirty grey, and the horns blackened.

So from having no personal experience at all with our rarest moth, inside a few days of latter August and early September, weeks after hope had been abandoned for the season, I found myself with several as fine studies of the male as I could make, one of an immense caterpillar at maturity, one half-transformed to the moth, and three fine pupa cases. Besides, I had every reason to hope that in the spring I could secure eggs and a likeness of a female to complete my illustration. Call this luck, fairy magic, what you will, I admit it sounds too good to be true; but it is.

All winter these three fine Regalis pupa cases were watched solicitously, as well as my twin Cecropias, some Polyphemus, and several ground cocoons so spun on limbs and among debris that it was not easy to decide whether they were Polyphemus or Luna. When spring came, and the Cecropias emerged at the same time, I took heart, for I admit I was praying for a pair of Regalis moths from those pupa cases in order that a female, a history of their emergence, and their eggs, might be added to the completion of this chapter. In the beginning it was my plan to use the caterpillars, and give the entire history of one spinning, and one burrowing moth. My Cecropia records were complete; I could add the twin series for good measure for the cocoon moth; now if only a pair would come from these pupa cases, I would have what I wanted to compile the history of a ground moth.

Until the emergence of the Cecropias, my cocoons and pupa cases were kept on my dresser. Now I moved the box to a chair beside my bed. That was a lucky thought, for the first moth appeared at midnight, from Mr. Idlewine's case. She pushed the wing shields away with her feet, and passed through the opening. She was three and one-half inches LONG, with a big pursy abdomen, and wings the size of my thumbnail. I was anxious for a picture of her all damp and undeveloped, beside the broken pupa case; but I was so fearful of spoiling my series I dared not touch, or try to reproduce her. The head and wings only seemed damp, but the abdomen was quite wet, and the case contained a quantity of liquid, undoubtedly ejected for the purpose of facilitating exit. When you next examine a pupa, study the closeness with which the case fits antennae, eyes, feet, wings, head, thorax, and abdominal rings and you will see that it would be impossible for the moth to separate from the case and leave it with down intact, if it were dry.

Immediately the moth began racing around energetically, and flapping those tiny wings until the sound awakened the Deacon in the adjoining room. After a few minutes of exercise, it seemed in danger of injuring the other cases, so it was transferred to the dresser, where it climbed to the lid of a trinket case, and clinging with the feet, the wings hanging, development began. There was no noticeable change in the head and shoulders, save that the down grew fluffier as it dried. The abdomen seemed to draw up, and became more compact. No one can comprehend the story of the wings unless they have seen them develop.

At twelve o'clock and five minutes, they measured two-thirds of an inch from the base of the costa to the tip. At twelve fifteen they were an inch and a quarter. At half-past twelve they were two inches. At twelve forty-five they were two and a half; and at one o'clock they were three inches. At complete expansion this moth measured six and a half inches strong (sic!), and this full sweep was developed in one hour and ten minutes. To see those large brilliantly-coloured wings droop, widen, and develop their markings, seemed little short of a miracle.

The history of the following days is painful. I not only wanted a series of this moth as I wanted nothing else concerning the book, but with the riches of three fine pupa cases of it on hand, I had promised Professor Rowley eggs from which to obtain its history for himself. I had taxed Mr. Rowley's time and patience as an expert lepidopterist, to read my text, and examine my illustration; and I hoped in a small way to repay his kindness by sending him a box of fertile Regalis eggs.

The other pupa cases were healthful and lively, but the moths would not emerge. I coaxed them in the warmth of closed palms—I even laid them on dampened moss in the sun in the hope of softening the cases, and driving the moths out with the heat, but to no avail. They would not come forth.

I had made my studies of the big moth, when she was fully developed; but to my despair, she was depositing worthless eggs over the inside of my screen door.

Four days later, the egg-laying period over, the female, stupid and almost gone, a fine male emerged, and the following day another. I placed some of the sand from the bottom of the box on a brush tray, and put these two cases on it, and set a focused camera in readiness, so that I got a side view of a moth just as it emerged, and one facing front when about ready to cling for wing expansion. The history of their appearance, was similar to that of the female, only they were smaller, and of much brighter. colour. The next morning I wrote Professor Rowley of my regrets at being unable to send the eggs as I had hoped.