These 2 _Marcellus_ were pale coloured, the light parts a dirty white; the submarginal lunules on hind wings were only two in number and small; at the anal angle was one large and one small red spot; the frontal hairs were very short. The first, or intermediate female, was also pale black, but the light parts were more green and less sordid; there were 3 large lunules; the anal red spot was double and connected, as in _Telamonides_; the frontal hairs short, as in _Marcellus_. These are the most salient points for comparing the several forms of _Ajax_. In nature, there is much difference in shape between _Marcellus_ and _Telamonides_, still more between _Marcellus_ and _Walshii_; and the latter may be distinguished from the other winter forms by the white tips of the tails. It is also smaller, and the anal spot is larger, with a broad white edging. From lot No. 2, twenty days, came:-- 1 female _Marcellus_, with single red spot. 1 female between _Marcellus_ and _Telamonides_; general coloration pale; the lunules all obsolescent; 2 large red anal spots not connected; frontal hairs medium length, as in _Telamonides_. 1 female between _Marcellus_ and _Telamonides_; colour bright and clear; 3 lunules; 2 large red spots; frontal hairs short. 1 female _Telamonides_; colours black and green; 4 lunules; a large double and connected red spot; frontal hairs medium. 2 female _Telamonides_; colours like last; 3 and 4 lunules; 2 large red spots; frontal hairs medium. From lot No. 3, twenty-five days, came:-- 1 male _Telamonides_; clear colours; 4 large lunules; 1 large, 1 small red spot; frontal hairs long. 1 female _Telamonides_; medium colours; 4 lunules; large double connected red spot; frontal hairs long. In general shape all were _Marcellus_, the wings produced, the tails long. From this it appeared that those exposed twenty-five days were fully changed; of those exposed twenty days, 3 were fully, 2 partly, 1 not at all; and of those exposed fourteen days, 1 partly, 2 not at all. The butterflies from this lot of 104 chrysalides, but which had not been iced, were put in papers. Taking 6 males and 6 females from the papers just as they came to hand, Mr. Edwards set them, and compared them with the iced examples. Of the 6 males, 4 had 1 red anal spot only, 2 had 1 large 1 small; 4 had 2 green lunules on the hind wings, 2 had 3, and in these last there was a 4th obsolescent, at outer angle; all had short frontal hairs. Of the 6 females, 5 had but 1 red spot, 1 had 1 large 1 small spot; 5 had 2 lunules only, 1 had 3; all had short frontal hairs. Comparing 6 of the females from the iced chrysalides, being those in which a change had more or less occurred, with the 6 females not iced: 1. All the former had the colours more intense, the black deeper, the light, green.