THE VALAIS OF SWITZERLAND. 103 



nearly every specimen is a male : E. gladalis, var. alecto a single speci- En ^- M - M. xv. 



men of an Erebia which I saw at the end of the Arolla Glacier (about 



7,000 ft.), and, after a hard run over the stones of the terminal moraine, 



secured, turns out to belong to this species : E. lappona this species 



had the highest range of any, according to our experience ; it occurred 



tolerably common about the higher slopes of the Col du Torrent, and 



also on the top of the pass (about 8,000 ft.) ; in descending from the 



Bella Tola I caught one specimen on the snow at about 9,000 ft., and saw 



others at nearly the same elevation ; it was common on the Eurka : E. 



tyndarus this species we only met with on the Col du Torrent, at from 



about 6,500 ft. upwards ; it was not common : E. ligea ? I believe 



that several Erebias, from Evolena and Vissoye, are referable to the true 



liyea: E. euryale being common at Vissoye and Evolena, in the valleys, 



and a few in Arolla Valley and the Eurka. Chionobas aello I caught 



two specimens in the Val d' Arolla, at about 6,000 ft., and afterwards 



another in the Val d'Auniviers at the foot of the Col du Torrent, at 



about the same elevation ; Sclater found it commonly on the Furka, and 



secured both sexes. Satyrus hermione this fine species was common 



about Vissoye, particularly frequenting the slopes of some dry rocky 



ground in the valley, exposed to the sun ; it has a sailing sibylla-]ikQ 



flight ; also in the Turtman Thai : S. actcea, var. cordula this species 



was also common at Vissoye, occurring in the same localities as the last, 



but nearly all caught were males. Pararge mcera this is one of the 



commonest butterflies in the Swiss valleys, at moderate heights; it loves 



to rest on the surfaces of rock overhanging the roads, and on walls, &c., 



exposed to the sun, starting out moderately like a grayling, the grey 



under-surface matching well with its chosen haunts : P. hiera we were 



apparently too late for this species, only securing a few worn specimens 



in the Val d'Herens, between Evolena and Arolla. Ccenonympha satyrion 



this pretty little " heath " was common at Arolla on damp ground, 



but also occurred more sparingly around ArolJa, in the Turtman Thai, 



on the Col du Torrent, and on the St. Grothard route ; the males were 



much commoner than the more brightly coloured females. Syricihus 



earthami not common ; a few in the Val d'Anniviers, at Arolla, Vissoye, 



and Zinal : S. alveus ? Vissoye and on the Bella Tola, but I am not 



sure that the specimens are rightly determined, owing to the difficulty of 



this group : S. cacalice sparingly at Vissoye and Evolena, but tolerably 



common at higher elevations on the Col du Torrent, the Bella Tola, and 



Eurka : S. sao one at Vissoye. Nisoniades tages abundant, flying over 



wet ground, at Arolla. W. A. EOEBES, St. John's College, Cambridge : 



IQth February, 1879. 



