The remaining pupæ were kept in a light room where 3 _Telamonides_ emerged the following day, and by September 4th 14 specimens of the same variety had emerged, but no _Marcellus_ or intermediate forms. From the 4th to the 20th of September a few more _Telamonides_ appeared, but between the 4th and 15th of the month 12 out of 26 butterflies that had emerged were intermediate between _Telamonides_ and _Marcellus_, some approximating to one form and some to the other form. The first pure _Marcellus_ appeared on September 4th, and was followed by one specimen on the 6th, 8th, 13th and 15th respectively. From this last date to October 3rd, 6 out of 10 were _Marcellus_ and 3 intermediate. On September 3rd, a specimen intermediate between _Telamonides_ and _Walshii_ emerged, “in which the tails were white tipped as in _Walshii_, but in size and other characters it was _Telamonides_, though the crimson band might have belonged to either form.” Butterflies continued to emerge daily up to September 20th, after which date single specimens appeared at intervals of from four to six days, the last emergence being on October 16th. Thus, from the time the box was removed from the ice-house, the total period of emerging was fifty-seven days, some specimens having emerged before the removal of the box. With specimens of _P. Ajax_ which appear on the wing the first season the natural pupal period is about fourteen days, individuals rarely emerging after a period of four to six weeks. Between August 20th and October 16th, the 50 following butterflies emerged:--