2 
PAPILIO XII., XIII. 
a little yellow in the interspaces, of secondaries largely yellow, black at the ends 
of the nervules. 
Under side pale yellow, the bands repeated, the submarginal yellow spots of 
primaries represented by a broad wedge-shaped band ; the black ground anterior 
to this occupied by a band of loose yellow scales; on secondaries the correspond¬ 
ing black ground is densely covered with similar scales, having along the anterior 
edge a macular stripe of pale metallic blue; the submarginal spots repeated but 
enlarged, and the one at outer angle is a broad rectangular bar; through the 
black discal bar sometimes runs a blue streak; in some examples there is a faint 
fulvous discoloration on the yellow ground of secondaries, in median interspaces, 
but as a rule, there is no trace of this. 
Body black above; a yellow stripe from the head to the insertion of sec¬ 
ondaries ; but often the black area is restricted to a narrow band from head to 
end of abdomen; beneath, the thorax is yellow with two oblique black stripes; 
abdomen yellow with a lateral black stripe from insertion of secondaries to last 
segment, and two stripes ventral. (Figs. 1, 2.) 
Female. —Expands from 4 to 4.8 inches. 
Upper side as in the male; the blue scales in border of secondaries more dense, 
and continued across the wing, presenting the appearance of a macular band; 
the spot at outer angle as in the male. (Figs. 3, 4.) 
The figures on Plate represent the summer brood, and examples of this brood 
from California and Washington Territory are nearly all ochrey-yellow, while 
those of the spring are clearer. All examples observed from the Rocky Moun¬ 
tains are less ochraceous than those to the westward. 
Yar. Arizonensis. 
Wings less falcate, the black bands heavy, the tails bent in, very little or not 
at all spatulate on inner side. (Figs. 5, 6.) 
Egg. — Sub-conoidal, base rounded and flattened ; surface smooth ; color deep 
green. (Fig. a.) Duration of this stage ten to thirteen days. 
Young Larva. — Length .1 inch ; cylindrical, the anterior segments thickened ; 
color dark brown, mottled black ; on 8 a whitish patch, the width of the seg¬ 
ment, rounded at the ends and taking in the sub-dorsal tubercles, but descending 
the sides no farther; this patch covers the posterior part of 7 also, and is there 
broken into spots; an obscure light line runs the length of the body just under the 
sub-dorsal tubercles; on dorsum of 2 are four minute tubercles, or mere points, 
in two cross-rows, the front pair twice as far apart as those on 3, the other pair 
outside these ; from 3 to 13 are two tubercles to each segment, close together, 
and each of these points sends out one short hair; the sub-dorsals are large on 
2, 3, 4, 11, and 12, conical, pointed, with one hair at apex and five about the sides, 
