1900] ENTOMOLOGICAL NEWS. 385 



black as in taylori, tlie black borders of these spots being reduced to fine 

 lines, so that the general appearance of the wings is that of a paler 

 insect. The most characteristic difference, however, is found in the mark- 

 ings of the under side of the wings. In M. taylori the light spots are 

 conspicuous, and are well defined, both externally and internally, by 

 heavier shades. , In M. helvia only the spots in the middle and end of the 

 cell and a few near the apical region are bright and distinctly defined. 

 All below the median vein and the upper median nervule in M. helvia 

 are quite obscure and stand forth indistinctly upon a much paler fulvous 

 ground than in M. taylori. In M. taylori, on the secondaries, the median 

 band of light spots is bordered externally by two- fine black lines, includ- 

 ing between them a dark reddish-brown or almost blackish shade. The 

 median band in M. helvia is not thus externally defined by a heavy dark 

 shade. The facies of the under side of the specimen is wholly different 

 from any specimens of AI. taylori known to me, because of these facts 

 which I have pointed out. 



9 — The female is like the male, but larger. The same differences from 

 M. taylori which were noted in the case of the male reveal themselves in 

 the case of the female as to the markings on the under side of the wing, 

 and it will be perfectly easy to discriminate the two forms by noting the 

 points to which I have called attention. 



Expanse rT 32 mm.; 9 35 mm. 



2 S S , White Horse, N. W. Territory, June 24. 19, Eagle 

 City, Alaska, Jtily 8. (Young). 



Tlie type of helvia is reputed to have been destroyed in the 

 Chicago fire. After carefully comparing Dr. Scudder's descrip- 

 tion with the specimen before me, in which work I was joined 

 by Dr. Skinner, I am forced to the conclusion that the speci' 

 mens before me are this long-lost species. Because of its evi- 

 dent nearness to M. taylori, which is well known to collections, 

 I have given the foregoing conij^arison of the two forms to aid 

 in their proper discrimination. 



Genus PHYCIODES Doubleday. 

 II. P. pratensis Behr. 



I refer the specimen before me to this species, although upon 

 the under side they are much paler, and prevalently less dis- 

 tinctly marked than specimens of P. pratensis coming from 

 more southern latitudes. Most of the specimens are, however, 

 too badly worn to enable me to be quite sure whether this is a 

 positive characteri.stic of the form. The species of this genus 

 appear to me to badly need revision. 



