26. A single male butterfly was taken at Heart River Crossing, 

 June 26, which resembles very closely Amhlyscirtes vialis in the form 

 and neuration of the wiags, in the structure of the legs and antennae, 

 and even in the coloration and markings of the wings, so far as these 

 could be made out from a somewhat rubbed individual ; but there is 

 a perfectly distinct indication of a discal dash of raised scales, the 

 sexual mark of the fore wings in so many Astyci, which is altogether 

 wanting in Amblyscirtcs. I await the reception of further material 

 before describing this interesting form. 



27. Ocytes Uncas (Edw.). One pair, both fresh, were taken 

 at Heart River Crossing, near timber in the Valley of the river, June 

 26. At the crossing of the Big Muddy, on the open prairie, two fe- 

 males, one of them fresh, tlie other somewhat less so, were taken 

 June 28. 



28. Atrytone Logan (Edw.) Sciidd. A torn and rubbed 

 male and a pretty fresh female were taken on the banks of the Yel- 

 lowstone, among sage brush on the river bottom, July IS* 



llElrfARkS ON Tflfi Old OENtS CALLIDRtAS. 



At the conclusion of his admirable monograph of the Callidryades,^ 

 Mr. A. G. Butler attempts to divide the species into groups, and with 

 a great degree of success. He places, however,- all the old world 

 forms i-n a single genus, retaining for it the name Gatopsilia (with 

 Pap. crocale Cramer as type), and placing Murtia of Hiibner as a 

 Bynonyme. It will be a matter of surprise, however, if a further 



•' Lep.' exot, parts' iii^xviif. 



