33 



A LIST OF BUTTERFLIES OBSERVED IN SWITZERLAND 



IN JULY, 1899. 



By a. F. Rosa. 



The following species of butterflies and varieties were met 

 with between the Ist and 13th July last summer, during a tour 

 in the Valais and adjacent Bernese Alps, the exact districts 

 visited being the Visp Valley, Zermatt and neighbourhood 

 (seven days) ; between Leuk and Kandersteg, over the Gemmi 

 (three days) ; and in the vicinity of Aigle (two days). 



The weather was very cold nnd unsettled at the beginning of 

 the month, and afterwards inclined to remain dull for several 

 days. The last few days were, however, bright and warm. 



Papilionid^. 



Papilio machaon. — Occasionally seen in all the districts visited, as 

 Zmutt, St. Niklaus, Leuk, Leukerbad, Kandersteg, Aigle (frequently), 

 and Le Sepey ; several fine specimens being secured. 



Parnassius apollo. — Very common in the Nicolai Thai and Zmutt 

 Thai ; also between Aigle and Le Sepey. 



P. delius. — A few taken flying languidly along the sides of the 

 Visp at Zermatt ; also a good many found lying on a marshy bank, on 

 the ground among the grass. 



PlERID^. 



Aporia cratafji. — Very common in the Zmutt and Nicolai Thais ; 

 also at Leukerbad, Kandersteg, Aigle, &c. 



Pieris brassica;. — Abundant at Leukerbad ; seldom seen elsewhere. 



P. raptB. — Only one or two seen. 



P. napi. — A few at Stalden, and plentiful on the Gemmi in the 

 pine forest above Gastern-Thal. — Var. hnjoyiia. Very fine specimens 

 from the Gemmi ; also one or two at Stalden. 



P. callidice. — A short series of this fast flier on the Riffelberg and 

 Gorner Grat ; also taken on the Gemmi Pass. 



Enchlo'e helia var. simplonia. — Turned up occasionally at Tiisch, 

 Stalden, Zmutt, and on the Gemmi. 



E. cardamines. — Two males and several females taken, and others 

 seen. 



Leiicophasia sinapis. — Common in the neighbourhood of trees and 

 bushes between Zermatt and Visp ; also taken at Aigle, &c. — Ab. 

 erysimi. Three specimens of this variety at Randa, Leuk, and Aigle 

 respectively ; alio a few between this and the type. 



Colias phicomone. — Not rare, and in first-class condition at St. 

 Niklaus, Zmutt, and on the Gemmi Pass ; the depth of the yellow 

 ground colour varying considerably, one about as deep as G. rhamni 

 male, and from this seem to vary to the very palest yellow ; none of 

 the males, however, are as white as the female [phicomone). 



C. hyale. — Pretty common, but seldom in good condition. Zmutt, 

 Leukerbad, and on the Gemmi near Kandersteg ; also at Le Sepey. 



