THE CANADIAN ENTOMOLOGISTo 125 



I am certain that there are just twelve white or black marginal markings 

 on the fore wings ; these color marks are so narrow, some of them so 

 short and sometimes so faint, that it is well nigh impossible to describe 

 the species with anything like accuracy. The most distinct and salient 

 mark is the oblique dark gray or gray brown streak on each side of each 

 segment of the whitish or pale gray ventral surface of the abdomen. 

 Indeed, owing to the indistinct and confused character of the markings 

 on the fore wings, I have sometimes doubted whether I have not two very 

 closely related species before me. I think, however, there is but one, but 

 any, even the least denudation — such, even, as is almost inevitable in 

 pinning and setting a specimen, even where the denudation is so little 

 that it requires comparison with other specimens to detect it — alters the 

 character of the markings so that a description could scarcely be prepared 

 from one specimen by which another could be recognized. The original 

 description was prepared several years ago from three specimens, and I 

 have never seen another until this year (May, 1877), when I have taken 

 two others. 



The wings are very narrow, but the general color and the style of 

 ornamentation are much nearer to those of many species of Oriiix than 

 to any species of Gracilaria known to me. It is, however, a true 

 Gracilaria, belonging to the same section (as I think) with our salicifoliella 

 and the European Kallasiella. In perfectly fresh specimens three or four 

 distinct white dorsal streaks are found before the middle of the wing 

 length, one of which is much larger and more curved than the others, and 

 is placed a little before the middle, and there is another and very similar 

 one about the anal angle. There are some five or six tolerably distinct 

 blackish costal streaks, most of them in the apical half of the wing, and 

 very close to each other ; they are the dark margins of as many white 

 streaks, which, however, are, some of them (sometimes all of them save 

 one or two), very indistinct. One of these white costal streaks in the 

 apical part of the wing meets at an acute angle the distinct curved white 

 dorsal streak of the anal angle above mentioned, and just behind it an 

 oblique, narrow, much curved white fascia crosses the wing to the anal 

 angle, where it is continuous with the whitish or pale gray hinder marginal 

 line, which crosses the middle portion of the dark gray ciliae (or the cilise 

 may be described as pale gray, with two wide dark gray hinder marginal 

 lines, one at their base, the other at their tips). But the least denudation 

 removes portions of these white and blackish markings, so that they pre- 



