210 KHOPALOCEEA. 



d. General colour of the wings greenish black. 

 e 1 . Submarginal spots of the secondaries red. 



33. Papilio xenarchus. 



Papilio xenarchus, Hew. Ex. Butt., Papilio, t. 5. f. 12 l . 



Alis viridescenti-nigris ; anticis fascia submarginali maculosa viridi-alba ; posticis fascia discali lata, venis in 

 maculas septem elongatas divisa, coccinea ; ciliis inter venas albidis : subtus fuliginoso-nigris ; posticis 

 lunulis septem submarginalibus notatis et maculis tribus ad basin coccineis ; abdominis lateribus coccineo 

 notatis. 



Hal. Mexico \ Jalapa (Schaus). 



This form, which has the red band of the secondaries wide, appears to be much rarer 

 than that with the narrow band of isolated spots, P. eridamas, and the only examples 

 we have seen are Hewitson's type, one without precise locality in our collection, and 

 specimens in that of Mr. Schaus. It is a question whether these forms are really 

 specifically distinct, but for the present we prefer to treat them so. They both occur 

 in the same district of Eastern Mexico. 



34. Papilio eridamas. (Tab. LXVII. fig. 10 s .) 



papilio eridamas, Reak. Proc. Ac. Nat. Sc. Phil. 1866, p. 248 \ 



P. xenarcho similis, sed fascia maculosa posticarum multo angustiore, maculis singulis fere rotundis, primo visu 

 distinguendus. 



Hah. Mexico \ Atoyac (H. H. Smith), Cordova (Bumeli), Coatepec (Brooks), Omealca 

 (Trujillo). 



The width of the spotted band of the secondaries of P. eridamas as compared with the 

 much wider one of P. xenarchus seems a safe character by which to distinguish the 

 two forms ; but there is some variation in P. eridamas as to the number of these 

 spots; some of our examples have seven, others six, and one only five red spots. 

 Those specimens in which the full complement of seven is not present have a series 

 of small or obsolete greenish-white spots between the red spots and the outer margin, 

 that at the apical angle being the largest. A female in Dr. Staudinger's collection 

 has all the red spots, except that near the anal angle, sprinkled with light scales, a 

 character we do not observe in any of our examples. 



P. eridamas was first described by Mr. Eeakirt from a Mexican specimen in the 

 collection of the Entomological Society of Philadelphia 1 . No special locality was 

 mentioned, but we now know that the range of the species is limited to a very 

 restricted area extending from Jalapa to the neighbourhood of Cordova and Atoyac. 



