1894.] 221 



visited were the wood on the left hand side of the torrent, which runs 

 through Yernet, about ten minutes' walk above the hotel, where 

 TTiecla roboris occurred in some numbers with EucJiloe eiiplienoides 

 and Melanargia Lacliesis ; the valley of St. Yincent, where many 

 species occur on an ancient glacial moraine of large extent ; and the 

 slopes between the Col du Chevai mort, and the Pla Guilhem for the 

 alpine species. 



On leaving Yernet, we stayed for two days at Bagneres de Luchon, 

 whence we made the excursion to the Lac d'06. The weather, how- 

 ever, was unsatisfactory, and although we found many interesting 

 plants, including the beautiful JRamondia pyrenaica, which is peculiar 

 to the central and western Pyrenees, we saw very few butterflies of 

 interest. 



From Luchon, after visiting Lourdes, which has been so much 

 before the public, we went on to Cauterets, for which you leave the 

 railway at Pierrefitte, and drive through one of the beautiful wooded 

 valleys with a rushing torrent below, so characteristic of the central 

 Pyrenees. Here we again rejoined Herr Seebold, who had just 

 arrived from Yernet. As he was well acquainted with the localities 

 in the neighbourhood, his assistance was of great value to us in our 

 short visit. The best localities we visited were a steep bank on the 

 left hand side of the valley between Cauterets and La E-aillere, the 

 neighbourhood of the Lac de Gaube, and the slopes of the Cabaliros 

 to the north-west of the village. 



"VYe concluded our expedition with a few days at Biarritz, where, 

 on July 25th and 27th, we took several interesting species in some 

 marshy ground near the Lac de la Negresse, on the left hand side of 

 the Railway to Bayonne. This marsh was interesting from a botanical 

 point of view, as Erica ciliaris, Lobelia urens, and Spiranthes cestivalis, 

 all grew freely there. Here we took the curious Cyclopides MorpTieus, 

 CcBnonymplia (Edipus, Satyrus Dryas, S. Aretliusa, and S. statilinus. 

 Their capture, however, was not effected without some difficulty, as 

 owing to the wet weather which had preceded our visit, the marsh 

 was unusually treacherous, and our first efforts after C. Morplieus 

 were frequently rewarded by a partial immersion. 



Mr. Elwes remarks that it is strange that such an extensive and 

 isolated range as the Pyrenees should have developed so few distinct 

 forms. However, the present form of the alpine fauna of Europe is 

 probably at least as old as the last Glacial Epoch, when these species 

 could have inhabited the plains between the Alps and the Pyrenees, 

 and on the amelioration of climate, thoy may have retreated into the 



