PAPILIO. 205 



22. Papilio corbis. (Tab. LXVI. figg. 7, 8 cJ .) 



Papilio corbis, Godm. & Salv. Ann. & Mag. N. H. ser. 6, iii. p. 357 \ 



P. philenori affinis, sed posticis fere ecaudatis: subtus margine posticarum aeneo-virescente multo angustiore, 

 maculis suis rufescentioribus distinguendus. 



Hab. Mexico, Valladolid, Northern Yucatan (Gaumer 1 ). 



We have several specimens of this form of P. philenor, including both sexes. The 

 males have a submarginal row of spots on the primaries just as in the females, only 

 rather smaller ; as a rule these are not present in the males of P. philenor. 



23. Papilio orsua. (Tab. LXVI. figg. 9, 10 6 .) 



Papilio orsua, Godm. & Salv. Ann. & Mag. N. H. ser. 6, iii. p. 358 \ 



c? P. pMlenori quoque similis, sed multo minor et alis nitide caerulescentioribus ; posticis ecaudatis, maculis 

 submarginalibus magis rotundatis et pure albis : subtus posticis a margine usque ad cellulam nitide 

 cyanescentibus, maculis suis saturate rubris. 

 2 mari similis, sed maculis omnibus majoribus et magis distinctis. 



Hab. Mexico, Tres Marias Islands (Forrer 1 ). 



This is also a form of P. philenor, probably peculiar to the Tres Marias Islands. As 

 in P. corbis the tails of the secondaries are not developed ; but it differs from that species 

 in the bluer tint of its wings, the spots of the hind wings being of a clearer white and 

 further from the outer margin. Beneath, the metallic blue margin of the secondaries 

 is much wider, extending up to the cell. On the opposite mainland at Acapulco and 

 Mazatlan the true P. philenor is found. 



E. P. THYMBEiEUS, P. BEANCHUS, P. PHAON, &C. group. 

 Papilio, Sect, x., xi. (except Sect. x. Subsection D), Feld. Sp. Lep. pp. 10, 11, 52, 53. 



The fold along the inner margin of the secondaries in both P. thymbrceus and 

 P. branchus and their allies is much simpler than in the preceding groups ; the wing 

 is not completely folded back, and the surface is covered with normal scales, the outer 

 edge is convex. The base of the underside of the secondaries is marked with red 

 spots, which are characteristic of the members of this group. 



The distal end of the foliate appendage of the fore tibia is much nearer the distal 

 end of that joint than its base is from the proximal end. 



The harpes are, so far as we have examined them, similarly constructed. The 

 projection on the middle of the lower surface is present in each case as in P. zestos 

 &c.,but the terminal portion is much more, complicated, as will be seen from the figures 

 (Tab. LXVII. figg. 2, 5, 7, 9). 



All the members of the various sections of this group are South American in their 

 domicile, none are found in the north beyond the limits of Mexico. P. thymbrceus 



