PARNASSIUS 1 1— IV. 
micropyle, and showing at each corner a minute cell. Deposited upon leaves and 
stems of Sedum. 
Larva unknown. 
In this series of specimens there is remarkable variation; in size, the lar- 
gest being full twice that of the smallest, in the extent of the transparent margin, 
in the density of the black border to abdominal margin, in the hook projected 
around the extremity of cell, in the size and shape of the black spots on costal mar- 
gin of primaries, in the number and size of the crimson spots on same wings, those 
of the costa varying from one to four; in the black spot on inner margin, varying 
from nil to a conspicuous patch, with or without crimson centre; in the shape and 
relative size of the two crimson spots on secondaries, and in the presence or absence 
of one or two spots at anal angle; in the hind margin of secondaries, sometimes im- 
maculate, at others ornamented with conspicuous black crescents; on the under 
side also, the four basal spots of secondaries, though always present, vary from 
grey to black, usually with crimson centres, but frequently without, or show but 
two or three of the number so marked; the colored spots also on both sides vary 
from deep crimson to ochraceous and are either with or without white pupils. In 
short the variation is sufficient to include several distinct species, were not the gra- 
dations so regular that it is not possible to draw a dividing line. What I for- 
merly described as Sayii, ?, is undoubtedly but an extreme variation, and I pre- 
sume this is the Nomion of Boisduval. P. Behrii, I am satisfied, is another variety, 
distinguished by the orange color of the spots and the heavy submarginal lunules 
on secondaries, surely distinct enough to be ranked as a species were it not for the 
many intergrades between it and the type. 
Mr. Mead was fortunate in obtaining numbers of eggs of & mintheus by en- 
closing the females with the food plant. From some of these the drawings on the 
plate were made by Mr. Konopicky, Artist to the Museum of Comparative Zoology, 
Cambridge, through the kindness of Dr. Hagen. A large number of drawings 
of eggs of other species, sent by Mr. Mead, and representing rare Coloradian but- 
terflies, were made by the same distinguished artist. To him also I am indebted 
for the drawings of the abdominal pouch represented on the plate. 
The eggs obtained by Mr. Mead were carefully watched, but, two months after 
they were deposited, and very near the end of the season, they showed no signs of 
hatching, though on opening some of them the living larvae w r ere found. Therefore 
we are still ignorant respecting their period or the habits of the larvae. If it had not 
been for the speedy approach of cold weather, the latter might be supposed to 
hatch early in September and to spend the winter in webs as do the larvae of 
Melitaea. It was the opinion of Mr. Mead that this was impossible and that they 
