22 BUTTERFLIES. 
orange-colored spots near the margin of the hind wings, 
which are larger and more conspicuous on the under than 
on the upper side. The wings beneath are lighter brown, 
with a row of deep but bright orange spots near the hind 
margins of both pairs, an inner and more irregular row of 
small black spots, encircled with white, and on the middle 
of the hind-wings two similar spots, placed close together. 
The wings, extended, measure about an inch and a quarter 
across. 
The caterpillars of all species of this genus are peculiar 
beings. That of titus is a curious flat creature, of a dull 
green color, with a yellowish tint, a patch of rose color on 
the anterior segments, and another larger one on the pos- 
terior extremity; the head is small and of a polished black 
color. The caterpillar resembles a common wood-louse or 
sow-bug in outline. 
The chrysalis is pale-brown, and somewhat glossy, with 
numerous, minute, dark-brown or blackish dots over the 
whole surface. It is thickly covered with very short brown 
hairs, scarcely visible to the eve. 
This interesting butterfly, illustrated in Fig. 23, plate 
III, occurs sometimes in large numbers towards the end of 
July. The caterpillars feed upon the leaves of wild and 
cultivated cherries, plums and oak, but they are not numer- 
ous enougk to cause much damage. 
THE BANDED HAIR-STREAK. 
(Thecla calanus Hub.). 
This beautiful butterfly is not common in Minnesota. 
The upper surface of its wings are dark brown, with brassy- 
green reflections. The hind-wings have two very unequal, 
thread-like tails, of which the lower one is the longest; it is 
also edged with white. The base of the fringes, from the 
anal angle to the lower tail, is white, and at this place there 
