GRAPTA I. 



The two forms of this species were figured and described in Volume I as 

 distinct. In Canadian Entomologist, V, p. 184, 1873, I gave the result of 

 breeding larva? from eggs laid by a female Dry as, at Coalburgh, the same year. 

 Among the imagos both Comma and Drt/as appeared, and seasonal dimorphism 

 was established. In Vol. VI, p. 157, 1874, I showed that eggs laid by Comma, 

 later called form Harrisii, produced Dryas. So that either form produced both 

 forms. In Vol. X, p. 69, 1878, 1 gave a statement of all observations to date, and 

 said that at Coalburgh there were three broods of the butterfly annually, and 

 the individuals of the third hibernated. That the hibernating females deposited 

 their eggs last of April or early in May, and the first brood of the butterflies 

 came from chrysalis about 1st June ; but should the weather be cold during 

 May, then from middle to last of Jime. That the second laying of eggs took 

 place in July, between loth and 30th, and the butterflies from these appeared 

 last of August or early in September. That the third laying of eggs occurred 

 in September, and the butterflies from them came out in October. That, so far 

 as appeared from breeding, or from observations in the field running through 

 many years, the last laying of eggs produced Harrisii only, and that the series 

 l)egan in the spring with eggs laid by females of that form exclusively. That 

 the result of the eggs laid by these hibernating Harrisii had in all cases been 

 Dryas, with a single exception, when a male Harrisii appeared. That the next 

 brood of the season, the eggs having been laid by Dryas, had sometimes con- 

 sisted wholly of Dryas, but in others of both forms, Harrisii considerably out- 

 numbering Dryas. That the third brood, eggs laid by Dryas, had given Harrisii 

 only and closed the season. 



In same magazine, XIV, p. 189, 1882, I brought the history down to date. 

 It appeared that in different years there Avas variation of at least a month in the 

 laying of eggs by the hibernating females, depending largely on the state of 

 the weather, and consequently nearly or quite a month's difference in the ap- 

 pearance of the first brood of the butterflies of the year. 



I now bring together all these observations, with others to end of 1887. 



First Brood : Eggs laid by Harrisii. 



1869, 18th June, from chrysalis came 1 J Harrisii. 



1871. Between 10th and 18th May, found larvce. Result, from 20th May to 

 2d June, 7 Dryas. 



1873, 20th May, found larvfe. Result, about 20th June, 4 Dryas. 



1874, 10th May, obtained eggs from female in confinement. Result, about 

 27th June, 34 Dryas. 



