POLYMORPHIC BUTTERFLY. 261 
continue to lay them until as late as May 23d; the eggs hatch in 
from seven to eight days and the caterpillars are from twenty-two 
to twenty-nine days in attaining their growth. 
Telamonides, which, as stated above, is only a later variety of 
the same brood, “ begins to fly some weeks after Walshii, and both 
forms... . are for a time common.” Telamonides evidently 
lays its eggs very soon, for “on dissecting the abdomen of a newly 
emerged female, the eggs are found to be fully formed though not 
full-sized. Iconclude that they mature with great rapidity because 
fertile eggs are laid by apparently fresh and uninjured females.” 
Mr. Edwards records eggs laid from May 11th to June 2d; these 
are hatched much more rapidly than those of Walshii (although 
they are not always laid later in the season), namely, in from four 
to five days ; the caterpillars, too, mature more quickly, attaining 
their growth in from fifteen to eighteen days, thus often overtaking 
their tardier predecessors. ‘* About the first of June Walshii 
[imago] disappears, and before the end of the month Telamonides 
also.” 
Still farther south, it is evident that the apparition of the butter- 
flies is advanced ; for in Georgia, Abbot records Walshii as emerg- 
ing from the chrysalis March 2d, and Dr. Chapman took it in 
northern Florida, in the latter half of February, 1868 and 1869; 
late in March he also records the species as ‘‘numerous,” so we 
may perhaps fairly surmise that Telamonides appears at this time. 
** About the first of June, Marcellus begins to appear and shortly 
is out in great numbers, continuing to be abundant till last of 
October.” The broods overlap each other so as to be distinguished 
With difficulty, but it appears that, besides the brood of Walshii- 
Telamonides already mentioned, there are at least three successive 
broods of Marcellus.* The larve of Telamonides, as we have 
Seen, often overtake the later larvee of Walshii—the earlier laryæ 
are by this time (the middle of May) in chrysalis and continue 
fourteen days ; the first brood of Marcellus from these chrysalides, 
and from those of Telamonides, continues to emerge until at least 
the ninth of J uly, or for more than five weeks.t The chrysalides 
_* Mr. Edwards’ language on this point seems a little vague; he says: “ Besides the 
first brood from Walshii, or Telamonides, there are three successive broods of Mar- 
cellus, and the rae ge fourth give chrysalides that go over the winter, thus 
making five broods pe 
Aras of a ae of lacres from eggs of Walshii, reared in 1871, Mr. I A 
While the mass of the chrysalides (all of which suspended within a week of 
