PAPILIO III. 



Egg similar to that of Walshn. Duration of this state 4 to 5 days. 



The larvae of Marcellus combine the variations of Wahlili and Tdamonides, 

 about oue half resembling those of the former, and most of the remainder being 

 either green or blue-green, as before described, with blue, black and yellow bands 

 on fourth and fifth segments. Duration of the larval state twelve to nineteen 

 days. 



Chrysalis similar to that of Wulsku, but varying much in size, the largest 

 being .1 broader and .2 longer; thoracic process more prominent and hooked, and 

 the reticulations and abbreviated bands more conspicuous. Color either brown or 

 green. Duration of chrysalis state 11 to 14 days. 



I subjoin the diagnoses of these forms given by Mr. Felder in his Sjiecies 

 Leijidopterorum, Vienna, 18G4, pp. 15 and 59. 



Section 23. Sub-section E. — Marcellus. 



" Wings mueli broader than in preceding sub-sections, (i. e. Sinon, &c.) hind wings deeply 

 dentated, much more produced, costa convex, tlie lower disco-cellular nervule of fore wings less sinuous, 

 the cell of hind wiug broader, the lower disco-cellular nervule much longer." 



Sub-section F. — Telamonides and Ajax {Ahbotii and Walsh ii). 



" Fore wings less produced apioally, the cell shorter; costa of hind wings longer but anal region 

 much less produced than in MarccUus ; the superior and inferior disco-cellular nervules of fore wings a 

 little concave outward ; cell of hind wings much shorter, the inferior disco-cellular nervule shorter; 

 tail narrower, shorter; club slender ; front very hairy." 



Here therefore are three well defined forms, differing in many specific charac- 

 ters and long recognised as distinct species. For eight years past I have had 

 favorable opportunities for studying their habits, and have been intent on solving 

 what very early struck me as a mystery. I am pleased at last at having met with 

 sufficient success to warrant my giving the results thus far obtained in this volume. 



Mr. Wallace, (Natural Selections, pages 145-159,) has admirably described and 

 illustrated the phenomena of dimorpliism or polymorphism. This is occasioned by 

 common parents producing two or more forms of offspring of distinct types, without 

 intermixture or hybridism, and among the lepidoj^tera, as stated by this author, 

 has usually been observed in the female sex only. We have many examples in our 

 fauna, partly cases of albinism, as in Colias, of flavisra, in Anthocaris, or of 

 melanism, as in Lyctena, and notably in case of Papilio Tarni/s, one of our largest, 

 most widely distributed and best known butterflies. The male of this is always 

 yellow, but the females in the ]\Iiddle and Southern States are dimorphic, one 

 form being yellow like the male, the other black. (There are however occasional 

 cases of true hybridism between dimorphic forms, and I have several examples 

 of hybrid Turnus, one of which is perfect.) We have also a case of dimorphism 

 in Orapta Iiderrogationis, that embraces both sexes. There is another phenomenon 



