GRAPTA I. 



1875, 14th May, obtained eggs as last described. Result, about 18th June, 

 19 Dry as. 



1882, 17th April, obtained eggs, etc. Result, about 22d May, 12 Dryas. 

 1886, 16th May, found larvae. Result, 1st June, 2 Dryas. 

 That is, 78 Dryas to 1 Hakrisii. 

 Second Brood : Eggs laid by Dryas. 



1870, July, found larvte. Result, 2 Dryas. 



1873, 30th July, obtained eggs from female in confinement. Result, about 1st 

 September, 6 Dryas, about 50 Harrisii. 



1876, 29th July, obtained eggs, etc. Result, about 14th August, 5 Dryas. 

 1886, 25th July, came from chrysalis, from found larva?, 2 Harrisii, 1 Dryas. 

 That is, 14 Dryas, 52 Harrisii. 



Third Brood : Eggs may have been laid by either form. 



1870, last of September, found 70 larvae. Result, in October, all Harrisii. 



The butterflies of the first brood then have come from chrysalis from 20th 

 May to 18th June, in different years. Of the second brood, from 25th July to 

 2d September ; of the third, about middle of October. 



The caterpillars vary much, as shown on the Plates in Volume I, some being 

 very black at maturity, others greenish-white. But the color does not indicate 

 the form of the imago. From one lot of larvte in June came 19 Dryas, though 

 eleven of the larva? were black, eight white. 



Comparing the behavior of the species with what is in New England ; accord- 

 ing to Mr. Scudder, the first brood comes from chrysalis at the end of June and 

 to middle of July, the second from about 25th August to last of September. 

 This may be regarded as the history in northern New England. In the Catskills 

 of New York, at Hunter, elevation about 2000 feet, I have found two broods, 

 from about 20th August, all the individuals seen being Harrisii, in midsummer 

 Dryas. In the lowlands of New York, I think there are three broods, but no 

 one seems to have carefully observed about this. Mr. Lintner, at Schoharie, took 

 both forms 24th July, wdien, if there were but two annual broods, only Dryas 

 should have been flying. 



The winter form Harrisii is found as far to the north as Fort Simpson, Mac- 

 kenzie River, whence I formerly received several examples (as stated in Vol. I), 

 in a large collection of butterflies made during one or two seasons by Mrs. Ross. 

 As no Dryas appeared, it is to be presumed that this form did not fly there, and 

 that the species was one-brooded only. And, according to Mr. James Fletcher, 

 the recent collections made under the auspices of the Canadian Government 



