102 ON BUTTERFLIES OBSERVED IN 



of the alpine form of dorilis, which differs from the type in being unicolo- 

 rous above, and with no redness beneath. Lyccena argyrotoxus (cegon) 

 this blue swarmed in the lower part of the Val d'Arolla, rising in 

 crowds from the muddy water in the roads, &c. P. argus I secured 

 two specimens from amongst the crowds of the last, and doubtless passed 

 over many more ; will somebody explain why, in two such closely allied 

 species, one (cegon) should possess, the other (P. argus) want, the " horn- 

 stachel " on the fore tibiae : P. eumedon rather common at Evolena, and 

 one on the Furka. L. escheri two specimens, one in the upper part of 

 the Val d'Anniviers, coming down from the Col du Torrent, and another at 

 Evolena : L. corydon Evolena, Zinal, &c., and one, remarkable for the 

 brightness of its blue, which approaches that of bellargus (adonis), at 

 about 6,500 ft. on the Bella Tola : L. Jiylas several at Vissoye, and also 

 occurred at Evolena and in the Val d'Arolla, but only one female : L. 

 damon only one, a male, above Evolena : L. minima (alsus) very 

 common ; I was surprised to see our little " Bedford blue," so local an 

 insect in England, in the Alps at elevations of 6-7,000 ft., as at Arolla 

 and on the Col du Torrent ; also on the Eurka : L. semiargus (acis) 

 common at Evolena, Vissoye, Arolla, &c. : L. alcon rather common at 

 Evolena, and one at Vissoye : L. arion occurred at every place we 

 visited. Limenitis populi a single specimen of this fine species in the 

 river-valley at Vissoye sitting on the poplars, and safely secured by 

 Sclater. Melitcea cynthia Sclater secured a single male of this species 

 on the Eurka ; we were probably too early for it elsewhere : M. aurinia, 

 var. merope a single specimen at Arolla, one in the Turtman Thai, and a 

 fine series from the Eurka : M. ri-nxia Vissoye, Evolena, &c., common : M. 

 plioebe Evolena, Val d'Arolla, and common about Vissoye and at Sierre. 

 M. didyma common at Vissoye and Sierre : M. dictynna fairlv common 

 at Evolena, Vissoye, Arolla, &c. : M. athalia common, Evolena, Vissoye, 

 Arolla, &c. : (M. parthenie one at Lausanne). Argynnis pales one at 

 Arolla, and tolerably numerous at high elevations (7-8,000 ft.) on the 

 Col du Torrent and Bella Tola ; also occurred or the Eurka, and between 

 Andermatt and Amsteg ; we did not see the var. arsilache : A. dia 

 one at Sierre : A. amathusia fairly common at Vissoye and Evolena, in 

 damp places along the valleys : A. ino with the last: A. laiJionia one 

 near Vissoye: A. niobe, var. eris one at Vissoye, others on the St. 

 Gothard route ; we did not see paphia or adippe : A. aglaia rather 

 common. Erebia epiphron (the form helamus ?) sparingly in the higher 

 parts of the Vals d'Herens and d'Anniviers ; also on the Bella Tola, 

 Eurka, and the St. Gothard route : E. ceto very common in the valley at 

 Evolena, and a few elsewhere : E. stygne this species also abounded at 

 Evolena, but occurred higher than the last, frequenting, not the meadows 

 near the river, but the rocky slopes at the side of the valley; also 

 sparingly at Arolla, Zinal, in the Val d'Anniviers, and on the St. Gothard ; 



