398 
THE STUDY OF INSECTS , . 
ment. The chrysalis is about one inch in length. It is 
bright green, dotted With gold. 
This species occurs throughout the greater part of the 
United States, and is distributed far beyond our borders. 
Fig. 469 .—Anosia plexipfius. 
It is believed, however, that the species dies out each year in 
a large part of the Northern States, and that those butter¬ 
flies which appear first in this region, in June or July, have 
flown hither from the South, where they hibernate in the 
adult state. In the extreme South they fly all winter. 
Great swarms, including many thousands of individuals of 
this species, are sometimes seen. 
Subfamily NYMPIiALINiE (Nym-pha-li'nse). 
The Typical Nymphalids (Nym-pha'lids). 
The butterflies of this subfamily vary so much in the 
outline and ornamentation of the wings that it is impossible 
to briefly characterize them. The student, however, will 
have no difficulty in distinguishing them by means of the 
table of subfamilies already given. Our genera represent 
five quite distinct groups, as follows:— 
I. The Crescent-spots or the Melitceids (Mel-i-tae'ids).—This 
group includes some of the smaller members of the Nym- 
