THE CANADIAN ENTOMOLOGIST. 71 



1874 — 10th May, obtained eggs from °_ Harrisii in confinement. 



Result about 27 th June — 34 dry as. 

 1875 — 14th May, obtained eggs from °. Harrisii in confinement. 



Result about iSth June — 19 dry as. 



1869 — 1 8th June, obtained from chrysalis 1 <£ Harrisii. 



This last is the only exception to the rule which I have noticed. 



SECOND BROOD : Eggs laid by DRYAS. 



1873 — 3 0tn J u ty> obtained eggs from dryas in confinement. Result 



about 2nd September — 6 dryas, many Harrisii. 



1875 — 29th July, obtained eggs from dryas in confinement. Result 



about 24th August — 5 dryas only. 



THIRD BROOD : Eggs probably laid by both forms. 



1870 — Last of Sept., found 70 larvae which must have come from eggs 



laid early in Sept. Result, in Oct. — all Harrisii. 



I have never taken or observed an example of dryas in the fall or in 

 the spring after hybernation. This form is recognizable at sight, as both 

 sexes have the hind wings black on upper side, whereas in Harrisii these 

 wings are red. 



II. INTERROGATIONS; dimorphic forms FABRICII and 

 UMBROSA, both figured in But. N. A., Vol. 1. 



I have raised several broods of this species, obtaining eggs by con- 

 fining the females, during the past six years, and have also recorded the 

 results obtained from eggs or larvas found. There are at Coalburgh three 

 full broods annually, as with comma, but there is an effort towards a 

 fourth, more or less successful, depending on the length of the season or 

 the temperature in the fall months. Some individuals hybernate, and the 

 females so surviving lay their eggs in the last days of April or early in 

 May. From these eggs come butterflies last of May or first of June. 



The second laying occurs early in June and the butterflies therefrom 

 appear early in July. 



The third laying takes place last of July and the butterflies appear in 

 September, some as early as first, others late in the month. The females 

 of this brood, which is the third of the year, or some of them, lay eggs 

 about middle of September and the butterflies emerge in October. But 



