74 THE CANADIAN ENTOMOLOGIST. 



end of the cell, and has a common origin with the apical branch, which 

 is bifid close to the apex. The median divides into three branches from 

 -the apical part of the cell (the submedian is furcate at the base ?) 



Secondaries very narrowly lanceolate. The costal attains the margin 

 about the basal fourth, and from thence to the tip the margin is excised • 

 the subcostal is almost obsolete towards the base and passes straight to 

 the tip ; discal cell unclosed ; the median divides into three ? branches 

 (or into two ? with an independent discal branch arising so close to them 

 that I have not been able to determine certainly whether it is connected 

 with them or not). 



Head smooth with appressed scales ; vertex wider than long ; antennae 

 simple, scarcely more than half so long as the wings, with a somewhat 

 elongate basal joint. No visible maxillary palpi; labial palpi long and 

 slender, over-arching the vertex ; terminal joint about two-thirds as long 

 as the second. Tongue moderate, densely scaled towards the base. 



A. osfry^el/a. JV. sp. 



Face, palpi, legs and under surface of the body pale or hoary gray 

 ^vith a faint bluish tinge. Vertex, antennae, thorax and primaries dark 

 •steel gray, with a blue or purplish tinge. The basal portion of the dorsal 

 margin of the primaries pale gray, with many of the scales tipped with 

 hoary ; behind this lighter portion of the dorsal margin is a rather large 

 raised tuft of blackish or bluish brown scales. An oblique pale gray or 

 whitish fascia crosses about the middle of the wing, being widest and 

 farthest from the base on the dorsal margin, and being margined behind 

 by two small dark tufts of raised scales. About the apical third of the 

 wing is a second fascia of the same hue with the first, and parallel to it, 

 with a small dark tuft of raised scales on its anterior margin and two 

 others on its posterior margin, and in the apical part of the wing, on the 

 dorsal and costal margins and at the apex, three or four other minute 

 tufts of the same hue. The apical part of the wing and ciliae are 

 sprinkled with hoary or snoAv-white, many of the scales being tipped with 

 that color. AL ex. scarcely ]/^ inch. Kentucky. 



The larva mines the leaves of the Ironwood ( Ostrya virgin ica). I 

 have occasionally, though very rarely, found a single specimen of the mine 

 in June and July, but in August, September and October nearly every 

 leaf upon the trees will have its mine, and many leaves will contain 

 •several. The larva is yellowish white, with the mouth ferruginous, and 



