1865.] 221 



border is denoted solely by a narrow black line, and anotber (R) in 

 which the border is composed of black spots, placed at the extremities 

 of the veins. There are usually two orange discoidal spots upon the 

 secondaries, of which the outer is the least, but in this instance there 

 is but one. The secondaries are also frequently powdered with black 

 atoms, sometimes quite densely, but more especially in the white 9 ■ 



On the under side there is but little variation, save in the size of the 

 discoidal spots. The silvery pupil has an extreme range of variation, 

 usually geminate, sometimes singular. Other points liable to change, 

 have been enumerated under the phases of the male. Ciliae vary in 

 color from pale roseate to dark reddish-brown. 



Mr. J. A. Lintner says, in Proc. Ent. Society, Vol. Ill, p. 55, " I 

 have in my collection, one in which the black border of the primaries 

 is without the spots which characterize the 9 , an d one in which the 

 secondaries have on their inferior surface but a single discoidal sil- 

 vered spot." 



I have two remarkable types of variation to describe, of which the 

 first, (F) if it were not for the venation and shape of the wings, would 

 have to be considered a lightly-colored specimen of M. Csesom'a. 



The black atoms at the base extend far down the wing, and the 

 border is thrown into such a form as to present the strongest possible 

 resemblance to the " Dog's Head," so well marked in Csesonia and 

 Euryrfice.. 



Below, the primaries are destitute of the sub-marginal spots, of which 

 there is a slight trace on the secondaries ; the two wings agreeing ex- 

 actly in color. The discal spots are very large on both wings; on the 

 primaries, black, not pupilled ; on the secondaries, silvery, surrounded 

 by a narrow ferruginous line, outside of which there is a small reddish- 

 brown dot. Cilias are entirely bright rose-colored. This insect was 

 captured at Harrisburg. 



Variety No. 2, is the female of specimen (K) described on a preced- 

 ing page. 



It is of rather less size ; of a soiled white ; agrees in markings with 

 the male, with these additions on the upper surface; that the discal 

 spot of the primaries is pupilled with white ; that there is a small black 

 dot situated above the medio-central nervule. within the marginal curve ; 

 and that the ciliae are reddish-brown. 



In forming these notes I have had about seventy specimens before me. 

 and as will be seen by the following list, from a great number of localities. 



Hah — Philadelphia, Harrisburg, Williamsport, Elmira, Niagara, 

 Harrer's Ferry, Chambersburg, Cincinnati, Peoria, Rocky Mountains, 



