. The butterflies of the eastern United States and Canada : with special reference to New England. Butterflies; Butterflies. 1152 THE BUTTERFLIES OF NEW ENGLAND. ing that nearly a year must pass before tlie butterfly will issue. Immediately after the skin dropped tlie thorax was a little prominent (4) ; no indication of this had been. given by the larva, and it enlarged almost imperceptibly, while the dorsum remained arched. This was the attitude up to fifteen minutes. At twenty the depth of thorax inch; the process .1 inch long, .03 wide at base, partly raised, semi-translu- cent (bein
. The butterflies of the eastern United States and Canada : with special reference to New England. Butterflies; Butterflies. 1152 THE BUTTERFLIES OF NEW ENGLAND. ing that nearly a year must pass before tlie butterfly will issue. Immediately after the skin dropped tlie thorax was a little prominent (4) ; no indication of this had been. given by the larva, and it enlarged almost imperceptibly, while the dorsum remained arched. This was the attitude up to fifteen minutes. At twenty the depth of thorax inch; the process .1 inch long, .03 wide at base, partly raised, semi-translu- cent (being hollow, a thin shell), not yet rounded (5) ; the abdomen and all the dor- sum still retained the larval colors, even to the yellow band, every tubercle and spot having its corresponding pale black spot or point; the wing cases and under side of head and the process dark brown. As the depth of the thorax increased the girdle was tightened and the dorsum bent in; and when at thirty minutes the projection touched the stick, the dorsum was bent in at an angle which fell a segment below the girdle. The pupa had thus assumed its final shape (6), the process meanwhile having straightened and rounded, becoming .18 Inch long and .OG broad at base. The depth of thorax was now .17 inch. At about twenty-four hours the pupa had assumed its final colors, losing the resemblance to the larva. Fig. 1 represents the attitude of the larva for a time before pupation began. (Cut leut by Mr. Edwards.) Life history. The life history of this butterfly is extremely simple. It is single brooded and hibernates in the chrysalis state. In the north the butterfly has only been taken in May. It appears with the first foliage, at about the end of the first week in May, varying, of course, with the season, and flies to or nearly to the end of the month, possibly in late seasons a few davs into June. It seems to remain on the winjr but about three weeks. The eggs are laid certainly within a week of the first
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Keywords: ., bookauthorscuddersamuelhubbard1, bookcentury1800, bookdecade1880
