Genus Papilio 
1894. It is one of the largest and most showy species of the genus 
found within our faunal limits. 
(9) Papilio aliaska, Scudder, Plate XLI, Fig. 1, 6 (The Alas¬ 
kan Swallowtail). 
Butterfly. —This interesting form of the species, known to 
entomologists as Papilio machaon , Linnaeus, and to every Eng¬ 
lish school-boy as “the Swallowtail,” represents a colonization 
from the Asiatic mainland of this insect, which is the sole repre¬ 
sentative of the genus on English soil. It differs from the Eng¬ 
lish butterfly by having more yellow on the upper side of the 
wings, and by having the tails of the secondaries much shorter. 
Early Stages. —Undoubtedly these are very much like those of 
the forms found in Europe and Asia, and the caterpillar must 
be sought upon umbelliferous plants. 
Thus far this insect has been received only from Alaska, and 
is still rare in collections. 
(10) Papilio zolicaon, Boisduval, Plate XXXVIII, Fig. 1, $ 
(Zolicaon). 
Butterfly. —This species is somewhat nearly related to the pre¬ 
ceding, but may at once be distinguished from it by the broader 
black borders of the wings, the deeper black on the upper side, 
and the longer tails of the secondaries. The figure given in the 
plate is only two thirds of the natural size. 
Early Stages. —These have been fully described by Edwards, 
and are shown to be much like those of P. asterias. The cater¬ 
pillar, like that of the last-mentioned species, feeds upon the 
Umbelliferce . 
Zolicaon ranges southward from Vancouver’s Island to Ari¬ 
zona, and eastward to Colorado. It is more abundant in the 
valleys and foot-hills than on the sierras. 
(11) Papilio nitra, Edwards, Plate XLI, Fig. 2, $ (Nitra). 
Butterfly. —This insect, which is still very rare in collections, 
is very nearly related to the preceding species, it having, no 
doubt, with the succeeding species, sprung from the same origi¬ 
nal stock as %olicaon and aliaska. 
Early Stages. —Unknown. 
The insect occurs in Montana and the portions of British 
America adjacent on the north. 
(12) Papilio indra, Reakirt, Plate XLI, Fig. 3, $ (Indra). 
Butterfly. —Easily distinguished by the short tails of the secon- 
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