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, $ (The Alas- 

 kan Swallowtail). 



Butterfly. — This interesting form of the species, known to 

 entomologists as Papilio macbaon, 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 zolicaon 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. }, 9 (Indra). 

 Butterfly. — Easily distinguished by the short tails of thesecon- 



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