PHYCIODES L, II. 



more formed a cluster and presently passed their third moult, after which they 

 became lethargic. I put them in the cellar, and there they remained till 7th 

 February, when such as were alive were placed on the leaves of an aster in the 

 greenhouse. The same day some were feeding. They all passed two more 

 moults before maturity. Probably those larvae which had moulted twice only 

 in the autumn died during the winter, as I found this to be the case in the 

 winter of 1877-78. The first chrysalis was formed 5th May, and its butterfly 

 emerged on 18th, or after thirteen days. Another emerged 30th, after eight 

 days, this stage being shortened as the weather became warmer. There resulted 

 eight buttei'flies, all Marcia, of the varieties designated B and C. This then 

 settled the position of Marcia as a dimorphic form of the species. . 



The first individuals seen by me in the field at Coalburgh were three males 

 Marcia, 18th May, and a week later both sexes were common. On 26th, I took 

 seven females, all distinctly Marcia, and tied them up in separate bags, on stems 

 of aster. The next day six of the seven had laid eggs, the clusters varying from 

 about fifty to two hundred and twenty-five eggs each. They were always laid 

 on the leaves, and usually on the under side of them, in rows nearly or quite 

 straight, and touching each other. In the larger clusters the layers were three 

 deep. These gave hundreds of caterpillars, and each brood was kept sepa- 

 rate. The butterflies began to emerge 29th June, the several stages being thus : 

 egg six days, larva twenty-two, chrysalis five. There were four moults and no 

 more, but much irregularity in every larval stage, so that some of the butterflies 

 did not emerge till 15th July. Just after these larvae hatched I went to the 

 Catskills, taking on6 brood with me, and they reached chrysalis there, and in that 

 stage were mailed to Coallmrgh whither I returned by the time the butterflies 

 were emerging. There was no perceptible difference in the length of the sev- 

 eral periods of this brood and the others which had been left at home, and none 

 of either lot became lethargic. The butterflies from these eggs of May, with a 

 single exception, were of the summer form, or the typical Tharos, which, for 

 convenience, I designate as IforjyJieus. This was the second generation of the 

 season, counting the one which proceeded from the hybernating larvae as the 

 first. 



On 16th July, at Coalburgh, I again obtained eggs from several females, this 

 time all Morjjheus, as no other form was flying. The eggs hatched in four days, 

 the larval stage was twenty-two, and chrysalis seven ; but as before, many larvae 

 lingered.' The first butterfly emerged 18th August. All were Moj'jjheus, and 

 none of the larvae had been lethargic. This was the third generation in succes- 

 sion, and from the second laying of eggs. 



On 15th August, at Coalburgh, I again obtained eggs from a single Morpheus 



