34 THE CANADIAN ENTOMOLOGIST. 



281. A. inaculaia Smith. — Though less rare than the preceding, this 

 seems never to have been taken in any numbers. I have taken a few 

 myself at Laggan, and Mrs. NichoU has taken a itw there and on Mt. 

 Athabasca, and near Lake O'Hara, on the British Columbian side of the 

 divide. My dates are all between July i6th and 27th. It is an above- 

 timber species, occurring between 7,000 feet and the summits, though I 

 have not been on any above 9,000 feet. 



283. Mamestra mystica Smith. — In my note on this species in Vol. 

 XXXVII, p. 151, line 5, for "The palest ^/5t:iz//.y and the darkest ;//j5//V^," 

 read, " the darkest discalis and the palest jnysticay I overlooked the slip 

 in the proofs. As to the distinctness of these two, there can be no doubt. 

 In colour discalis is pale blue-gray, mystica lacks the bluish tint and is 

 browner. They are also distinguishable on the characters previously 

 pointed out. In colour and ornamentation mystica is really nearer 

 ?iimbosa, and occasional specimens are indistinguishable. I had almost 

 decided that they were forms of one species, when I discovered slight 

 antennal differences, which may, however, prove to intergrade, though I 

 have not both forms from the same locality. In my males of nimbosa 

 from Montreal ; Milwaukee Co., Wis.; and Vancouver Island, the 

 antennae are ciliate and bristled, with the joints scarcely marked. Some 

 Pacific coast specimens have the ground colour very clean, with the brown 

 irrorations very much reduced, though so far I have found nothing else 

 about them to suggest distinctness of species. In my mystica^ from 

 Miniota, Man.; Alberta ; and Windermere, B. C, the male antennae are 

 minutely serrate, fasciculate and bristled, the bristle appearing to be 

 longest in Miniota, and shortest in Windermere specimens. In some of 

 those from Miniota, however, the joints are scarcely marked, and the 

 character may fail as distinctive. Sir George Hampson places mystica 

 and nimbosa^ with rogenhoferi, in a different group from discalis and 

 imbrifera on antennal characters, as having them ciliate only. He has 

 mystica from the type locality, Wmnipeg, and I have not, though I have 

 seen the type, and know the species well. Discalis has male antennae 

 serrate-fasciculate, but the serrations are not more prominent than in most 

 -of my mystica, and the bristle seems to be lacking. The type of nimbosa 

 is a male in the British Museum from Trenton Falls, New York. 



284. M. imbrifera Grt. — I have seen the type of this species in the 

 British Museum, a female, which, according to the Catalogue, comes from 



