290 THE CANADIAN ENTOMOLOGIST. 



nscending a grass-stalk ; arrived near the top it folded the hind wings 

 closely around the body and commenced vibrating the fore wings rapidly — 

 almost immediately the summons was answered, a male appeared on the 

 scene, and before I could prevent it coition had taken place. No further 

 males were taken that day. During the remainder of my stay the weather 

 was cold, cloudy and windy, and I saw no further specimens. There 

 seems no reasonable doubt but that the species flies only in the hottest 

 sunshine of early afternoon, and that flight ceases once copulation has been 

 effected. It is possible that the cool nights prevalent at this high altitude 

 have caused the alteration in habits, although I have taken H. htutiiili at 

 a similar altitude in the Swiss Alps at dusk, as usual. 



At the time the identity of the species was unknown to me. I could 

 only note that the species showed apparently great sexual dimorphism, 

 the males being deep reddish-brown, with numerous silver spots and bands 

 on primaries, whilst the females were lighter brown, in one case immacu- 

 late, in the others with an irregular black broken line, following the course 

 of the silver bands in the male. 



On returning home, with the excellent collection and library of Dr. 

 Barnes at my disposal, it was easy to identify my species as the one com- 

 monly known as hyperboreiis Mosch., according to Dyar's Catalogue. 

 Considerable doubt exists in my mind as to whether the synonymy as 

 given by Dyar is entirely correct, and with a view of perhaps eliciting 

 further information on the subject, I propose to make a {^^n remarks on 

 the different names : 



H. Jiyperboreus Moschler. 



The species was. described from a single male from Labrador ; 

 according to the figure and description, the band extending irregularly 

 from base to apex is broken, and does not touch the inner margin of iving; 

 there are several silver spots on the outer margin, besides those at base 

 and along costa ; the 9 is undescribed. Holland (Moth Book) figures a 

 specimen from the U. S. Nat. Mus., with no locality given. It agrees 

 fairly well with Moschler's figure, but the band appears to touch the inner 

 margin. I have '^een no specimens from Labrador or the extreme East, 

 and should advise collectors in these localities to keep a sharp look out 

 for it. 



