PAPILIONIDiE. 
315 
Gronepteryx mcerula is a large and handsome species, and is of a 
very pure citron yellow with a conspicuous black dot above the mid¬ 
dle of the fore wing and a few faint dark spots along the outer 
Gonepteryx mserula. 
margin. It is a striking object on the wing and is common in the 
warmer parts of Mexico. 
The other species, Gronepteryx clarinde , is almost white with a 
bluish green shade. A long yellow patch, beginning near the mid¬ 
dle of the upper margin of the upper wing, extends half way across 
the membrane. It includes in its outer margin a black spot sur¬ 
rounded by a ring of orange. A small dark spot is located near the 
centre of the lower wing, having an orange ring surrounding it also. 
Beneath, the insect is light green, the lower half of the upper wings 
being almost white. Faint buff lines extend along the larger veins, 
and a fine stipple of this color may be seen on the membranes if 
closely inspected. The dark spots of the upper side are faintly in¬ 
dicated by a pinkish shade beneath. The strong raised veins of the 
under side are undoubtedly a protection to the animal when at rest, 
as it is very leaf-like in appearance. This butterfly is common in the 
