PLATE XIII. 



Alse omnes supra atrse, albo punctatae disco omni albo, imma- 

 culato. Angulus ani ocello rufo. Sablus pallide flavescentes, albo 

 punctatas discoque albo. Linea rubra a basi ad medium costae. 

 Fabr. Ent. Syst. T, % j^.M:^'- ' ' ^ ' >l 



The Entomologist of the present day must naturally remain 

 under some uncertainty as to the identity of the Fabrician Papilio 

 Pylades, since no figure whatever has hitherto appeared in elucidation 

 of this rare Papilio ; and in this instance, as in almost every other, 

 whatever advantage we may be able to derive from the very accurate 

 and elaborate descriptions of our author, it would be absurd to deny 

 that a faithful delineation of the insect described, is not essentially 

 requisite, in order to determine with perfect satisfaction, the precise 

 species Fabricius had intended, , ; 



But, besides the want of a correct delineation, there is yet 

 another circumstance, not, perhaps, at present known, which might 

 have tended also to perpetuate this ambiguity, had it not been in our 

 . power to explain it : the intimation of which, it is presumed, will be 

 considered useful by the scientific Entomologist. Previous to the 

 time of Fabricius this elegant species had been unnoticed by any 

 author. Fabricius describes it in his Entomologia Systematica, and 

 refers for the specimen so described to the Cabinet of Mr. Francilloii, 

 That the insect, to which he adverts, was included in that celebrated 

 cabinet, we are well assured from our own inspection, but it stood 

 there unaccompanied by any indication of its being a specimen 

 described by Fabricius, or even a Fabrician species. The truth is, 

 that Professor Fabricius, upon this occasion, as in some others, took 



