LWT ER XOX 
STATES OF INSECTS. 
EGG STATE. 
ON a former occasion I gave you a general idea of what 
has been called, perhaps not improperly, the metamor- 
phosis of insects? ; but since that time much novel and 
interesting speculation on the subject has employed the 
pens of many eminent Physiologists; and besides this, 
the doctrine then advanced of successive developments 
has been altogether denied by a very able Anatomist, 
Dr. Herold, who, with a hand, eye, and pencil, second 
only to those of Lyonnet, has traced the changes that 
gradually take place in the structure of the cabbage-but- 
terfly (Pontia Brassice) on passing through its several 
states of larva, pupa, and imago. It is necessary, there- 
fore, that previously to considering separately and in 
detail the states of insects, I should again call your atten- 
tion to this subject, and endeavour to ascertain whether 
Dr. Herold’s hypothesis rests upon a solid foundation ; 
or whether that adopted from Swammerdam by all the 
2 The word “etamoeQow, and its derivative wstapoeQwors, are not 
extant in any Greek writer before the date of the New Testament. 
They are used to express any external change of form or colour, and 
metaphorically an inward change and progressive improvement of the 
mind. Comp. Matth. xvii. 2. (lian. Var. Hist. 1.1. c. 1. Rom. xiii. 2. 
2 Cor. ili. 18. They are, therefore, not improperly applied, as some 
have supposed, to the changes of insects. 
