( xliii ) 



'Butterflies of Europe,' p. 38, I was interested to see that 

 that author did not agree with Staudinger's views. He 

 treats satyrion as a distinct species, and remarks of its dis- 

 tribution in Switzerland : ' On all the Alps (from Wallis to 

 the Tyrol) somewhat variable, but without passing into 

 C. arcania. Commences to appear at about 4,000 feet. At 

 7,000 feet it begins to get scarcer in our fauna region, whilst 

 1,000 feet lower it often occurs very abundantly.' Ruhl also 

 adopts this view, and treats saUjrion as a distinct species, 

 whilst I recently observed that Dr. Jordan wrote many years 

 ago (E. M. M., xvi., p. 89) : ' It requires a great amount of 

 faith to believe C. mtijrion to be the same as C. areania. At 

 Heidelberg, C. arcania is most abundant and has exactly the 

 same habits as tithonus, flitting about amongst the bushes 

 and settling on the blossoms. C. satyrion, like 'pamphilus, is 

 essentially a grass insect, and apparently very little subject 

 to variation.' 



" In the opinion that ('.satyrion and C. arcania are distinct 

 species, I quite concur, and would suggest that, with the 

 exception of the white band bearing the ocellated spots on 

 the underside of the hindwings, the two species have no 

 other character in common. 



" Like most other lepidopterists, I have tried to unite 

 satyrion with arcania. Like Fi-ey I have failed, although the 

 series of C. arcania var. darwiniana, which were captured on 

 Monte Cristallo (Cortina), on August 8th, 1895, at an 

 elevation of about 5,500 feet, by Dr. Chapman and myself, 

 and which I now exhibit, shows some approach as a con- 

 necting medium, when compared with the typical C. arcania 

 taken at Mendel Pass on July 31st, 1895, at rather less than 

 4,000 feet elevation. The approach is to arcania in the 

 females, and to satyrion in the darkest males of the darwiniana 

 group, which are becoming somewhat unicolorous ; but I 

 think you will agree with me that the superficial resemblance 

 between these more unicolorous males of darwiniana and the 

 brighter of the Lautaret males of C. iphis is actually greater 

 than that between them and the especially bright males of 

 satyrion from the Swiss Alps, which were sent to me by 

 Prof. Blachier of Geneva. I have looked through the 



