THE CANADIAN ENTOMOLOGIST, 219 



ous purple brown spot curved on its upper edge, but straight on the 

 margin of the wing, so that when the wings are closed it presents the 

 appearance of a broad oval patch, one half of which is on one wing and 

 the other half on the other. Fringes corresponding in colour and 

 suffusion with the body of the wing. Hind wings pale silvery gray, the 

 fringe tinged with brown. Abdomen iridescent gray, terminating in pale 

 brown tuft. Tibia3 of posterior legs clothed with long buff-coloured hairs. 



Alar expanse from 7 to 8 mm. The pupae are sooty black, and 

 before the moths issue are protruded about two-thirds of their length from 

 the cocoons. Described from numerous bred specimens. I have great 

 pleasure in naming this pretty species after Mr. Charles N. Ainslie, of 

 Rochester, Minnesota, from whom I received the cocoons early in the 

 winter, indirectly through the kindness of Prof. Webster, and later by a 

 consignment direct from Mr. Ainslie. The cocoons are white, and about 

 the size of those of the Ribbed Cocoon-maker of the apple {Bucculatrix 

 pomifoliella, Clem.), which, though somewhat less distinctly ridged, they 

 quite closely resemble. 



" These cocoons," Mr. Ainslie writes, " are everywhere this winter,' 

 but most plentiful in woods, attached, as you see, to leaves and to moss 

 setse and grass blades at the base of the trees — the black oaks seeming to 

 have more on and around them than other trees." 



Some of the leaves received from my correspondent had attached — 

 generally to the under surfaces — crowded groups of from twenty to thirty 

 cocoons, and on many of the grass blades were double rows from one and 

 one-half to two inches in length. 



The past year seems to have been the first in which this insect 

 attracted attention, but occurring in such numbers, it is not impossible 

 that it may become seriously injurious. Mr. Ainslie informs me that he 

 has bred five distinct parasites from the cocoons, but as yet these are in 

 too small a proportion to the host insects to act as much of a check upon 

 them. 



The Bucculatrix above described was submitted to Mr. August Busck 

 for identification, and was by him pronounced distinct from any species in 

 the collection of the National Museum, and he therefore advised the pub- 

 lication of a description. 



