72 OF THE PUPA STATE. 
and sides, The whole body is enclosed in an external 
case or covering, of a horny consistence, which pre- 
vents the organs beneath from being so distinctly 
seen through, as may be observed in many other 
species of insects. These pupe are often tinged with 
gold: hence the Roman name awrelia, and the Greck 
term chrysalides. These terms have now been con- 
verted into English words, and, more general in their 
application, signify all pupe, whether gilded or not. 
For general convenience, chrysalises may be 
divided into two great classes; namely, those de- 
void of angular projections, and those having such 
projections. Hach of these present a variety of 
forms, and possess peculiar characters. 
The first, or angular pupe, are confined to Butter- 
flies ; in some of which the head projects into one 
short conical protuberance, as in the chrysalis of the 
common Cabbage Butterfly, and those species to 
which it is allied ; others project into a horn; ina 
third, the head is armed with conical eminences ; 
some few have nose-shaped prominences. 
The second, or conical, include the nocturnal 
lepidoptera, such as Moths, &c. They are without 
protuberances, and subject to less variety of form. 
Exceptions, however, present themselves in the 
Goat Moth, and Orange-tip Butterfly: the former 
having two points on the head, while the latter is 
distinguished by a fusiform process from the head 
and tail. 
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