156 THE CANADIAN ENTOMOLOGIST. 



emphatically differentiated for sex ; while in the Laggan occurrence, as also 

 in Ossiamis of Europe, the sexes differ but slightly in appearance. 



Ossianus flies at Laggan during July, or in forward seasons makes ics 

 appearance the last week of June. My earliest date for the male is June 

 2 2 (in 1 888, an early season). It is found at altitudes from 4,900 to 

 5,600 feet, usually in marshy places. It is not common anywhere in the 

 district, but occurs more freely than elsewhere in two subalpine bogs 

 about a mile south of Laggan, at 5,400 and 5,500 feet. I have taken the 

 female at Stephen, B. C, (5,290 feet), and the male at Emerald Lake 

 (5,600 feet). At Emerald Lake occurred also the single instance of formal 

 Jriclaris previously mentioned. 



A METHOD OF SECURING MOTHS' EGGS. 



BY JOHN B. LEMBERT, YO SEMITE, CAL. 



A practical way of procuring moths' eggs came under my observation 

 last season and the season before, through an Ardia oniata 9 that I sent 

 to Mr. Dyar while he was in Portland, Oregon. 



When I take an Arctia ornata ? , and she is ready to lay eggs, the 

 moment she shows signs of being stupefied in the Cyanide bottle I take 

 her out, close the wings over her back, and place her in a paper envelope ; 

 as soon as she revives, she will commence to scratch the paper with her 

 legs ; I then shake the envelope, and if she has given up some eggs, I 

 take them out, give her another dose of Cyanide fumes, and when she 

 revives a second time I have found as many as 125 eggs in the paper. 

 After she has given up this quantity the $ usually dies, even when left 

 to her own ways and means, and I have found them dead as perfect as 

 when they had just issued and were alive. 



Euchaetes sciurus, Arctia riiftila and Spilosoma vestalis will give 

 up eggs in this way also, and die like Ornata. 



A Lepisesia Clarkia ? has given up an egg in the Cyanide bottle, 

 but as it is so easily killed by ihe Cyanide fumes, I never tried to get 

 eggs from it in that manner. 



Of butterflies, the Colias Behrii $ 's have given up one and two eggs 

 at a time in this way. The method can no doubt be improved on, and, 

 by careful manipulation, the eggs of a great number of butterflies can be 

 obtained in a short time by those intending to rear larva?, and where the 

 food-plant is known it will make work so much easier for the entomologist. 



I my remark, also, that in a tube the eggs of Spilosoma vestalis, with- 

 out the aid of any plant moisture, take about three weeks to hatch, as do 

 also those of Arctia ornata^ if not longer. 



