PAPILIO. 191 



$ alis fuliginoso-nigris ; anticis plaga mediana sordide alba, venis tripartita vel quadripartita parte superiore 

 in cellula posita ; posticis vitta lata discali rubra et maculis duabus ad angulum apicalem coloris ejusdem : 

 subtus ut supra, vitta posticarum angustiore, medialiter pallidiore et venis quinquepartita. 



Hah. Beitish Honduras, Rio Hondo (Blancaneaux), Corosal (Boe) ; Guatemala, 

 forests of Northern Vera Paz, Polochic valley (F. L. G. & 0. S.), Cubilguitz, Cahabon 

 (Champion); Honduras 3 (Mus. Brit. 12 & Standing er) \ Nicaragua, Chontales (Belt, 

 Janson). 



This is a northern form of the well-known wide-ranging P. sesostris of South 

 America, the males being barely separable with certainty ; but the females may be 

 recognized by the position of the white spot of the primaries, which in P. zestos 

 occupies a portion of the cell, but in P. sesostris is placed much nearer the anal angle 

 of the wing, quite away from the cell and the neighbourhood of the median nervure. 

 The male of P. zestos appears always to possess the crimson spot near the anal angle of 

 the secondaries, an unstable character in P. sesostris. 



The type specimen of this species, a female, is stated to have been taken in Honduras \ 

 and was figured by Gray in his Catalogue of the Lepidopterous insects of the British 

 Museum. It was found by both ourselves and Mr. Champion in the forests on the 

 eastern side of Guatemala, and has been traced as far north as the Rio Hondo. 

 Southward it extends to Nicaragua, its place being taken in Colombia, including the 

 State of Panama, by P. tarquinius, to which it is very closely allied, as will be seen 

 below. 



Dr. Staudinger has recently lent us a female of this species from Honduras in which 

 the spot on the primaries is almost obsolete. 



2. Papilio tarquinius. 



Papilio tarquinius, Boisd. Sp. Gen. i. p. 296 \ 



P. zestos persimilis, sed subtus fascia posticarum a margine externo magis remota. 

 $ quoque margine externo posticarum nigro latiore. 



Hab. Panama, Bugaba (Champion), Chiriqui (ArcS), Lion Hill (M'Leannan). — 

 Colombia 1 . 



This form is very closely allied to P. zestos, and perhaps hardly sufficiently distin- 

 guishable from it to have a separate name ; but as names have been provided for both 

 forms, we think it better to retain them for the present. 



The sole difference in the male is the greater distance of the band on the secondaries 

 beneath from the outer margin; the dark border, too, in the female is rather 

 wider. 



Boisduval's description was based upon a female from Colombia, and specimens of 

 that sex in our own and Dr. Staudinger's collections agree with it. In our country it 

 appears to be confined to the State of Panama ; but it will be noted that as yet we have 

 seen no specimens of this form from Costa Rica ; we think, however, that P. tarquinius 



