TllE CANADIAN ENTOMOLOGIST. 399 



attention being drawn to the fact that the moths in life are of a much 

 brighter yellow than in the cabinet, the colour changing soon after death. 

 Mr. Denny has informed me that in 1905 Mrs. Denny discovered another 

 locality for it at Amherst Park, on the northern outskirts of Montreal, and 

 that a number were taken by his family and by Mr. Stevenson, and the 

 latter has inj'ormed me that he also found it in a different locality. 



In 1906 I was absent in England, but am informed by Mr. Winn 

 that he visited the locality at Montreal South three times, and took twelve 

 specimens in all, and Mr. Denny also took it at Amherst Park. This 

 year I again visited the locality at Montreal South, but with very poor 

 results. The first time was the evening of the 13th of July, but, though 

 conditions seemed favourable, none were flying. I supposed that owing to 

 the lateness of the season I was too early. I intended going over a week 

 later, viz., Saturday, the 20th, but the weather was rainy. On the 24th I 

 went again, and while hurrying along the railway track on my way to the 

 locality I sighted a single specimen indulging in the usual gambol back and 

 forth, but this time not more than five feet above the ground. I hastened 

 to mount my net, but while doing so had to back away from the moth, 

 which in its oscillating flight was gradually approaching me, as though 

 attracted by the white waistcoat which I was wearing ; as soon as possible 

 I made a stroke with my net and thought I had secured it, but on careful 

 examination found my net was empty and the moth had disappeared. 

 While waiting to see if it would again appear it rose from the grass into 

 which it had dropped, and, as usual, started off in a straight line of flight, 

 but a second stroke netted it, and it proved to be a nule in perfect 

 condition, while in 1905 many specimens were ragged by the r5th. I 

 hastened on to the old locality, expecting to find them flying there in 

 numbers, but no more w^ere seen. I went again on the 26th, though the 

 evening was unfavourable, as it seemed to be the last likely opportunity, 

 but none were seen. 



In contradistinction to my lack of success at Montreal South, Mr. E. 

 Denny and his son Arthur had great success in collecting the species at 

 the Amherst Park locality, taking about seventy-five specimens, and also 

 made the independent discovery of cast pupa-cases among the young 

 willows. Mr. D. S. Kellicott was led from his observations to believe that 

 Hepialus Argenteottiaculatus which he found boring in Ahiiis Incana 

 required three years to complete its transformations (Ent. Amer. I, 173, 

 IV, 153, Insect Life I, 250). If these observations were correct, it would 

 seem to be probable that Thule may also take three years to complete its 



