96 
PAPIUO. 
but are by far most abundant in intertropical coun- 
tries. They are more numerous in the new conti- 
nent than the old, but the difference is by no means 
considerable. In the former, Brazil alone produces 
between forty aud fifty species ; in the latter, the 
greatest number occur in the islands of the Indian 
Archipelago, already referred to as the native coun- 
try of the magnificent Omithoptera. The conti- 
nental parts of India, China, Java, Sec. likewise 
possess many fine species, and a few are found in 
New Holland. Europe is exceedingly poor in in- 
sects belonging to this group, there being only four 
indigenous kinds. These are P. Xnthus , P. Alex- 
anor, P. Machaon, and P. Podalirius ; the two 
latter, which are the most common, are well known 
to extend to Britain. 
The first species selected to exemplify one of the 
prevailing forms of this important genus, is 
