212 NORTH AMERICAN INSECTS. 
black veins, and a black border with two rows of white 
dots. ‘The body of its caterpillar is of a light violet color, 
with brown, red, and yellow lines. ‘he chrysalis is round, 
ereen, and embellished with golden dots. 
The ArGynnis is another genus of beautiful butterflies 
belonging to the diurnal lepidoptera, which we can not 
omit, although we can give it only a brief notice. A num- 
ber of its species are natives of North America, and some 
are common in all parts of the United States. They are 
ali of a yellowish-red color, with black spots on the upper 
side of their wings, and silvery spots on the under sides. 
These last so much resemble the mother-of-pearl in their 
glistening color, that the Germans call the insects Mother- 
of-Pearl Butterflies. The distribution and forms of these 
colors, as well as the size of the individuals, constitute the 
different species. Their caterpillars are cylindrical and 
thorny, and their chrysalis of an angular form, and orna- 
mented with golden or silvery spots. 
One of the most common species of this genus is the 
Ipaua (Argynnis Idalia), Fig. 56. Its fore wings are red 
Figure 56. 

The Idalia. 
