LIMENITIS I. 
winter. As the weather in spring becomes settled and warm, they emerge from 
their cases, ieed a few days sparingly, and pass the third moult, soon to be fol¬ 
lowed by the fourth and last, and must change to chrysalids from 1st to 15th 
June. 
The form Proserpina was by many lepidopterists considered to be a variation 
o 1 Ursula ; by others as a probable hybrid between that species and Arthemis; 
and others, again, suspected dimorphism with Arthemis. To settle the point, Mr. 
Mead made efforts to breed from the eggs of both forms in 1875, and in Can. 
Lnt., ^ 11., p. 1()2, relates the history of the experiment as follows : “ In obtaining 
eggs of Arihemis, I have been very successful, partly, I think, on account of a 
method of keeping the parent in good health and spirits, devised some years 
ago, and which has given very satisfactory results. A notch is cut in the side 
ol an empty wooden box, through which a branch of willow may be passed, 
care being taken to select a leafy spray so as to partially'fill the box with foli¬ 
age. It is then covered with gauze tacked fast on one side and part way on 
the adjoining sides, that on the fourth being held down by a piece of wood 
fastened to the remaining flap of gauze. This renders easy the examination 
cn ^ C ° i ntents at time - A saucer of ra w dried apple, sugared, and partly 
til led with water, is put in, and the cage is complete. Butterflies like Ar¬ 
ihemis will live in such a vivarium for two weeks and more after their capture, 
and appear to enjoy the food provided for them immensely, laying many more 
eggs than if inclosed in a bag and allowed to perish of hunger and thirst. My 
fifteen females of Arthemis have laid a very large number of eggs, probably over 
five hundred. They at first observe the usual custom of depositing the eo-gs on 
the tips of the leaves, but become reckless after a while and lay them anywhere 
1 counted considerably over a hundred upon the cloth covering the box A fe¬ 
male of Proserpina has also laid thirty-one eggs.” This was last of July at 
I miter m the Catskills. The larvae from these eggs in large numbers lived to 
make their cases, and part were brought by me to Coalburgh, while Mr. Mead 
retained part at Ithaca, N. Y. All these were found to be dead in the sprim- 
iroin our not understanding the conditions necessary for preserving them. But°a 
ew of the Arthemis larvae had been allowed to feed on the leaves of a small wil- 
ow, in New York city, and to make their cases on it, and three or four were alive 
lliese all produced Arthemis, and we therefore knew no more of the relationship 
ol Proserpina than before. ^ 
In August, 1876, I went to the Catskills too late by nearly a month for the 
season of these butterflies. But a few individuals, mostly females, were still fly- 
mg, and I took some of each form and treated as directed by Mr. Mead. All re 
tused to lay except one Proserpina, which deposited eleven eggs. The effect ol 
