THE CANADIAN ENTOMOLOGIST. 15 



Not far from one end the mine was widened a little and the cuticle 

 puckered, forming a small nidus like that of a Philocnistis pupa. Within 

 this nidus a small larva was visible. It was white, with the head pointed 

 before, but widened behindhand with the thoracic segments much swollen 

 and tapering rapidly from thence to the tail. (There is a good deal of 

 : esenil >1 nice between the very young larvae of Gracillaria Philocnistis and 

 Lithocolletis of the cylindrical group.) In a day or two it changed its 

 form, becoming cylindrical and pale yellowish white, and it left the mine 

 and went to the under side of the leaf, where it turned down the edge over 

 it, and, after eating out the parenchyma, turned it down in another place, 

 repeating this operation two or three times until it finally became a pupa 

 under the edge last turned down. Sometimes (at least in the breeding 

 jar) it leaves the leaf and pupates under a sheet or coverlet of white silk 

 iike G. salicifoliella and many other species. Which mode it follows in a 

 state of nature I am unable to say, having never found it in the pupa 

 state. G. juglandiella mihi mines the under surface of the leaves, 

 but the mine is larger and more blotch like, and when it leaves the mine 

 it goes to the upper side of the leaf which it curls upwards over itself and 

 there passes the pupa state. I do not mean to say that this habit of going 

 to the side of the leaf opposite the mine is universal in either species, but 

 only so far as I have observed it in some ten specimens of each. G 

 blandella is a very handsome species. 



A BALLOON SPIDER. 



BY WILLIAM COUPER, MONTREAL. 



"The American Naturalist" for May, 187 1, contains an interesting 

 article on " Flying Spiders," by J. H. Emerton. The species noticed by 

 him are, no doubt, allied to the gossamer of Europe, and the phenomenon 

 occurs early in autumn on the Islands of the St. Lawrence. 



During the month of July, 187 1, while trout-fishing on a large lake 

 near the Upper Assumption, about one hundred miles north of Montreal, 

 my attention was drawn to an inflated transparent substance of 

 an oblong cocoon shape, passing about fifty yards over my head. To this 

 miniature balloon, a thread was attached, and, on tracing it downward, its 

 architect was seen struggling on the surface of the lake. Taking up the 



