298 THE CANADIAN ENTOMOLOGIST. 



was usually but a few inches above the surface of the ground ; that the 

 larvae were searched for and found in late fall or early winter, and that 

 though about a dozen were found he did not succeed in breeding the 

 imago ) and finally that he' never took H. Thick anywhere, but exchanged 

 with the late Mr. Shaw, of Montreal, for a nice specimen which he after- 

 wards gave to the Museum at Cambridge, Mass. 



No further specimens, so far as I have been able to ascertain, were 

 taken till 1S85, in which year Mr. Shaw was so fortunate as to secure 

 nine specimens. Mr. Shaw, to the great regret of our members in the 

 Montreal Branch, died in 1886, and I was therefore unable to learn any 

 further particulars from him. 



In 1887 I searched in vain for the species, but in 1888 I was success- 

 ful in discovering it, and took twelve specimens. 



The locality where I discovered it, and which was probably the same 

 as where Mr. Shaw had found it, is the brow of the old sea terrace of the 

 post-pliocene period which extends for some miles east and west of Mon- 

 treal, at a point in the municipality of Cote St. Antoine on. the western 

 outskirts of Montreal, and just above the St. Henry Swamp. I only found 

 it in a very limited portion of this locality, not more than 400 or 500 feet 

 in length, and supposed it was restricted to this very small area. 



In 1889 I only secured six specimens, though I visited the locality 

 much oftener, and in 1890 one just before starting on a trip across the 

 continent, while in 1891 I only obtained two, and one other was taken by 

 Mr. Winn. 



From these facts I feared it was doomed to extinction in this locality, 

 as the Canadian Pacific Railway runs along the brow of the terrace, and 

 the swamp at its base is being drained and cultivated, and will be built 

 over in a few years. 



But last year we learned from one of our members that he had taken 

 the species about three miles further west, but on the level swampy tract 

 below the terrace, and some of our members went out on 15th July and 

 two specimens were secured. This year Mr. Winn has traced it out all 

 along this terrace, so that its range is much more extensive than we 

 supposed. 



The earliest date upon which I have taken it is 6th July, and the latest 

 upon which I have heard of its being taken is 20th July of this year, but 

 the specimens were worn and ragged. 



The species seems to fly only for about fifteen to twenty minutes in 



