BUTTERFLIES OF THE VICINITY OF NEW YORK CITY 
The butterfly is black, with two rows composed of yellow spots on 
each wing. The hind wings have blue scales or dashes between 
the two rows of spots. In the female the yellow spots are much 
smaller, and the blue scales very prominent. The caterpillar is 
bright pea-green, with a transverse black band on each segment, 
containing a row of yellow spots. It feeds on parsley, parsnip, 
celery, carrot and other allied plants. The species is found in 
Canada and the United States from the Atlantic to the Pacific 
coasts, in Mexico, Central America and the Antilles. 
3. Green Clouded Swallowtail (Papilio troilus). 
Found in open, sunny spots and along wood paths from the latter 
part of May until late in June, and again in August. The butterfly is 
velvety black, with a row of pale yellowish spots near the outer border 
on the fore wings. The hind wings are densely clouded with green 
scales in the male, with blue in the female. It is a common species, 
being distributed over a large area in America north of Mexico. The 
caterpillar lives on sassafras and spice-bush. It is green, with two 
very conspicuous eye-like spots on the third segment. It spins a 
silken web on the leaf on which it abides, drawing the leaf together 
lengthwise. 
