The Life-History and Anatomy of Butterflies 
it is easy for one who has studied the matter to tell approximately 
to what family the form belongs, even when it is not specifically 
known. Chrysalids are in most cases obscure in coloring, though 
a few are quite brilliant, and, as in the case of the common milk¬ 
weed butterfly (Anosia plexippus), ornamented with golden-hued 
spots. The chrysalids of the Nymphalidce , one of the largest 
Fig. 24.—Chrysalis 
of Anosia plexippus } 
final form (Riley). 
Fig. 25.— Chrysalis of Papilio philenor: a, 
front view; b 7 side view, showing manner in which 
it is held in place by the girdle of silk (Riley). 
groups of butterflies, are all suspended. The chrysalids of the 
Papilionidce , or swallowtail butterflies, are held in place by girdles, 
and generally are bifurcate or cleft at the upper end (Fig. 25), and 
are greenish or wood-brown in color. 
A study of the structure of all chrysalids shows that within 
them there is contained the immature butterfly. The segments of 
the body are ensheathed in the corresponding segments of the 
chrysalis, and soldered 
over these segments are 
ensheathing plates of 
chitinous matter under 
which are the wings of 
the butterfly, as well as all 
the other organs neces¬ 
sary to its existence in the 
airy realm upon which it 
^ ^ enters after emergence 
Fig. 2 6.—Pieris protodice: a , caterpillar; b, f rom chrysalis. The 
chrysalis (Riley). p ract ised ^ q{ ^ ob _ 
server is soon able to distinguish the location of the various parts 
of the butterfly in the chrysalis, and when the time for escape 
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