PHYCIODES I., 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 butterflies, 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 w r ere 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 loth July. Just after these larvae hatched I went to the 
Catskills, taking one brood with me, and they reached chrysalis there, and in that 
stage were mailed to Coalburgh 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 Morpheus. 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 Morpheus, 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 w r ere Morphexis, 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 
