THE CANADIAN ENTOMOLOGIST. 403 



period of flight. These are the chief obstacles that present themselves to 

 the collector whose ambition is to try and improve his knowledge by 

 putting forth whatever energy he possesses. For the past two or three 

 years I have been very anxious to find out something concerning the 

 habits of this particularly interesting moth, which occurs for a period of a 

 few days only, and with few exceptions for only a few minutes at a time at 

 twilight. These moths are termed " Ghost Moths," and no doubt derived 

 that name from their peculiar habit of flight, for just as it is getting dark 

 they seem to appear of a sudden from no particular place, make a few 

 erratic evolutions in the air, and disappear as suddenly as they appeared. 

 It was on the evening of the i6th of July, 1906, that my son 

 Arthur had the good fortune to catch Sthenopis thule at light on Park 

 Ave., Montreal. He had been collecting at the electric lights, and was 

 about to return home when his attention was attracted by the peculiar 

 flight of a moth, which in a few seconds settled in the road, and proved 

 to be Sthenopis thule. We at once turned our attention to this particular 

 moth, abandoning all other species for the time being. Previous to this 

 we had discovered a new locality where thtile could be found. Although 

 personally I had never visited what is known as the old original hunting 

 grounds known as Montreal West and South, but from information gained 

 I was able to form a good idea of what the conditions were. I at once 

 came to the conclusion that the locality referred to above, known as 

 Amherst Park, was the right spot, being much nearer the city, and 

 disposing of the uncertainty of catching the ferry boats, and it was to this 

 locality that our efforts were directed. From the i6th to the 23rd of July 

 this spot was visited regularly, the result being that 12 specimens in all 

 were taken. This was not thought very encouraging considering the time 

 and expense incurred in collecting them. The following year we visited 

 this spot each night regularly from the 9th, but strange to say no thide 

 was seen until July i6th, exactly the same date as our first capture the 

 year before, but on this occasion three specimens were taken. The 

 following night an expedition was arranged and we proceeded to invade the 

 haunts of this mysterious moth. On this occasion the moths were very 

 lively, and appeared to fly longer than usual. However, darkness soon 

 put an end to the sport, and when the material was gone over it was 

 found that 32 specimens had been captured. This I consider a good 

 catch. The greatest number of these were males, and I attribute the 



