Underneath the fore-wings were yellow at the base, and lead colour the remainder of their length.  The veins had the orange-red outlining, and the two large yellow dots at the costa showed through as well as the small one beside them.  Then came another little yellow dot of the same size, that did not show on the upper side, and then four larger round spots between each vein.  Two of them showed in the triangle on the upper side full size, and the two between could be seen in the merest speck, if looked for very closely.

The back wings underneath were yellow three-fourths of their length, then next the abdomen began a quarter of an inch wide band of orange-brown, that crossed the wing to the third vein from the outer edge, and there shaded into lead colour, and covered the space to the margin.  The remainder of the wing below this band was a lighter shade of yellow than above it.  From tip to tip he measured five and a half inches, and from head to point of abdomen a little over two.

While I was talking Regalis, and delighted over finding so late in the season the only one I lacked to complete my studies of every important species, Arthur Fensler brought me a large Regalis caterpillar, full fed, and in the last stages of the two days of exercise that every caterpillar seems to take before going into the pupa state.  It was late in the evening, so I put the big fellow in a covered bucket of soft earth from the garden, planning to take his picture the coming day.  Before morning he had burrowed into the earth from sight, and was pupating, so there was great risk in disturbing him.  I was afraid there were insects in the earth that would harm him, as care had not been taken to bake it, as should have been done.

A day later Willis Glendenning brought me another Regalis caterpillar.  I made two pictures of it, although transformation to the pupa stage was so far advanced that it was only half length, and had a shrivelled appearance like the one I once threw away.  I was disgusted with the picture at the time, but now I feel that it is very important in the history of transformation from caterpillar to pupa, and I am glad to have it.

Two days later, Andrew Idlewine, a friend to my work, came to the Deacon with a box.  He said that he thought maybe I would like to take a picture of the fellow inside, and if I did, he wanted a copy; and he wished he knew what the name of it was.  He had found it on a butternut tree, and used great care in taking it lest it `horn’ him.  He was horrified when the Deacon picked it up, and demonstrated how harmless it was.  This is difficult to believe, but it was a third Regalis and came into my possession at night again.  My only consolation was that it was feeding, and would not pupate until I could make a picture.  This one was six inches from tip to tip, the largest caterpillar I ever saw; a beautiful blue-green colour, with legs of tan marked with black, each segment having four small sharp horns on top, and on the sides an oblique dash of pale blue.  The head bore ten horns.  Four of these were large, an inch in length, coloured tan at the base, black at the tip.  The foremost pair of this formidable array turned front over the face, all the others back, and the outside six of the ten were not quite the length of the largest ones.