Papilionidce. 103 



In P. Orchamus, the fore-wings are much shorter, and 

 broadly triangular, with an oblique abbreviated fascia 

 extending across and below the extremity of the discoidal 

 cell, and the red patch of the hind- wing is of larger size 

 and ovate, extending into the extremity of the discoidal 

 cell, the outer and inner portion being marked by a 

 black spot, 



P. Polyhius and P. CaudiushsbYe elongated narrow tails. 



Papilio {Euryades) Reevii, nov sp. 



P. alis supra obscure fulvis, subtus pallidioribus et 

 magis stramineis; anticis macula subapicali flavescenti, 

 margine nigro, maculis marginalibus flavidis; posticis 

 dimidio postico supra fusco, subtus nigro, serie duplici 

 macularum, rubrarum alteraque macularum majorium, 

 supra lutearum, subtus straminearum, interposita; mar- 

 gine sinuato, incisuris albis, et 1-caudato. 



Expans. alar, antic, unc. 3^. 



Hab. — Buenos Ayres (J. W. Reeve) . Mus. Druce. 



The only specimen of this very interesting butterfly 

 which I have seen, is contained in the rich collection of 

 Mr. Druce, who has kindly allowed me to describe it, 

 and who has suggested the specific name adopted above, 

 in honour of the captor of the insect.* 



In proposing for it, however, a distinct specific name, 

 in the uncertainty which (as a unique specimen) rests 

 upon its sexual relationship, I must suggest the possi- 

 bility of its being the opposite sex of Papilio Duponchelii 

 of Lucas (Ann. Soc. Ent. France, tom. 8, pi. viii. p. 91), 

 an insect which its describer considered to be most 

 nearly allied to P. Grayi and Scamander, from Entre 

 Rios, between Parana and Uruguay, of the sex of the 

 typical specimen of which there appears to me also to be 

 some doubt. This is a black-winged butterfly, having a 

 broken macular yellovj fascia on the fore-wings, extend- 

 ing into a large discoidal yellow spot on the hind-wings, 

 followed by two rows of small round scarlet spots, yellow 

 marginal incisures, and a single tail. Of this insect M. 

 Lucas expressly says " Foeminam tan turn novi.^' Dr. 



* Figures of Mr. Druce's specimen will appear in my forthcoming 

 • Thesaurus Entomologicus.' PI. XXXIII. fig. 1, 2, 



I 2 



