PARNASSIUS II-IV. 



spots, indicated by the presence of a small cluster of scales near outer angle and by 

 a few scales in the several interspaces; the inner margin broadly covered with 

 black, doubly excavated in and below cell, projecting a point to end of cell, and 

 confluent at anal angle with a transverse black stripe that connects with the black 

 diseal sjwt; this spot is pointed with red; on the costa a large red spot within a 

 black ring; fringes black. 



Under side yellow, a shade paler, marked as above; secondaries have both cos- 

 tal and diseal red spots large, equal, and with white centres; an elongated red spot 

 also within the black spot at angle; at base three red spots, all edged without by. 

 black, the two lower ones large and the lowest of all three enclosing a white spot. 



Body black above covered thinly with yellow hairs, below densely covered ; 

 legs black; j^alpi yellow; antennse yellow and black. 



From a single male, taken by Lieut. W. H. Dall, in Aliaska, at the Ram- 

 parts, two hundred miles below Fort Yukon, June loth. This belongs to the 

 Chicago Academy and is probably the only butterfly remaining of their former 

 large and valuable Collection. Fortunately, not long before the fire. Dr. Stimjison 

 had lent me this unique, and for fear of future loss, I determined to figure it. The 

 only other specimen of which I have knowledge is the one described by Menetries, 

 and found in Siberia. Mr. Scudder has pointed out certain differences that are 

 to be found between the present specimen and that, consisting principally in 

 thei)resence of red in the diseal spot on upper side of secondaries, and in the up- 

 per basal sj)ot of under side. The grey bands of our specimen are also narrower. 

 But these are variations that constantly occur among the Parnassians, and I have 

 no doubt both are to be referred to one species. 



