THE CANADIAN ENTOMOLOGIST. 241 



is so abundant here that I have paid less attention to it than its beauty 

 deserves. It disappears in August, but at what time of the month I can- 

 not say." 



3. Mr. J, Alston Moffatt, of Hamilton, Ont, writes : " Here are the 

 dates of my captures of Ari/iemis for a series of years : 1873, 3rd July ; 

 1874, June 29; 1875, June 29; 1876, July 7 ; 1877, June 23 ; 1878, June 

 27 ; 1 88 1, July i. They seem to fly 3 or 4 weeks, then gradually dis- 

 appear. I have seen an odd one the middle of August, which I thought 

 very late. I never saw, or heard of their being seen, in Sept., in this 

 locality. Probably they are out a few days earlier than my first captures, 

 but the last week in June and the first in July is when we expect them, 

 according as the season has been late or early. I never saw or heard 

 anything to cause the slightest suspicion of their being double-brooded." 



4. Mr. Wm. Saunders, of London, Ont, writes : " With regard to 

 Arthemis, it occurs with us late in June and during July, and I think early 

 in August. I am satisfied that I have never seen one on the wing here 

 as late as Sept., and do not think I have ever taken one after the first 

 week in August." 



I hardly think it necessary to call more witnesses from Canada. 



Nor is the testimony from the .Adirondacks, of New York, favorable 

 to the existence of a second brood of Arthemis. Mr. W. W. Hill, of 

 Albany, who has collected for many seasons in these mountains, which 

 correspond in latitude to the W. Mts., says that while the species is exces- 

 sively abundant in July, he has not met with it in September. In New 

 Hampshire, Mr. C. P. Whitney, at Milford, writes : " Arthemis is rare in 

 this vicinity. All told, I have not seen 25 examples, and none that I now 

 recollect later than July." 



I do not say that it is not possible for here and there a larva of 

 Arthemis from eggs laid in July to go on to chrysalis and butterfly the 

 same season. There is no evidence from breeding that they ever do so ; 

 on the contrary, all the evidence so far is the other way. I have bred 

 many L. Disippus, and through many years. This is a three-brooded 

 species here, and the caterpillars of the last brood make cases at either 

 2nd or 3rd moult, about two-thirds of them at 2nd. I have never known 

 a caterpillar of any earlier brood stop at any stage and go into its case. 

 But I have reason to know that L. Ursula behaves quite diff"erently. I 

 have myself never been able to get eggs of this species. It is common in 

 our forest roads in June, but not common near my residence. After June 



