PIEEIS. 131 



subttis anticis fere ut supra, sed dilutioribus et apice flavo tinctis ; posticis pallide fuseo reticulatis et flavo 

 undique suffusis. 



Hab. Nokth America from Canada southwards 2 . — Mexico, Presidio, Ciudad in 

 Durango (Forrer), Amula (H. H. Smith), Puebla (H. J. fflwes), Jalapa, Orizaba 

 (F. D. G.), Cordova (Bumeli) ; Guatemala, Duenas (F. D. G. & 0. S.). 



This species occurs sparingly in the highlands of Mexico and Guatemala, though in 

 the latter country we only observed it in the neighbourhood of Dueiias, at an elevation 

 of 5000 feet above the level of the sea, and whence we brought home but a single 

 female example. From Mexico we have specimens of both sexes, which agree in every 

 respect with numerous examples from various parts of North America. The larva is 

 said to feed on Cruciferse. 



b '. First and second subcostal branches emitted before the end of the cell. 



3. Pieris calydonia. 



Pieris calydonia, Boisd. Sp. Gen. i. p. 439 \ 



Alis albidis, anticis costa ad basin, apice et margine externo decrescente ad angulum analem et introrsum 

 profunde sinuato fuscis, posticis quoque angustissime fusco limbatis : subtus fere ut supra, sed colore fusco 

 pallidiore et linea irregulari a costa? medio ad marginis externi medium coloris ejusdem ; posticis ocbraceo 

 tinctis, ad costa? basin flavis. 



5 mari similis, sed alis sordide albis, anticis costa pallide fuscescentiore et linea coloris ejusdem per cellulse 

 finem ad medium marginis externi transeunte : subtus, prsesertim in posticis, ochracescentioribus, anticis 

 ad basin flavis, posticis ad costse basin aurantio tinctis. 



Hab. Mexico, Amula, State of Guerrero, Atoyac (R.H. Smith); Guatemala, Yzabal, 

 Chuacus, Pacific slope (F. D. G. & 0. #.), Chacoj, Paraiso (Champion); Honduras, 

 Euatan Island ( G. F. Gaumer), San Pedro ( G. M. Whitely) ; Nicaragua, Chontales 

 (Belt) ; Panama, Calobre, Veraguas (Arce), David, San Feliz (Champion). — Colombia x ; 

 Venezuela. 



P. calydonia is a northern form of the widely-spread P. demophile, the males of the 

 two insects being very much alike, but the females differing, that of P. demophile having 

 a broad fuscous stripe along the inner margin of the primaries, a character not seen in 

 the allied species. Boisduval's description was based upon specimens from Colombia, 

 whence we trace it northwards as far as Southern Mexico, but it is apparently more 

 common in the State of Panama than elsewhere. Some variation is noticeable in the 

 dark outer border to the secondaries. In Guatemalan specimens this dark border is 

 just perceptible, but in examples from the State of Panama it varies in width, being 

 well developed in some specimens and hardly visible in others. This species too, as well 

 as the last-mentioned, is an inhabitant of the hot country, being found near the sea- 

 level up to an elevation of about 2500 feet. 



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