. The butterflies of the eastern United States and Canada : with special reference to New England. Butterflies; Butterflies. 1694 THE BUTTERFLIES OF NEW ENGLAND. tween the edges of some of the abdominal segments, holding on by which the tail was withdrawn, then elongated and the cremaster thrust into the mass of silk prepared for it. The schematic figures, PI. 87, fig. 20 a-c indicate this view of pupation. This is true to a certain extent with some butterflies ; that is, these ac- tions take place, but they are not true of others and are insufficient to effect the end in all, as the seizure o
. The butterflies of the eastern United States and Canada : with special reference to New England. Butterflies; Butterflies. 1694 THE BUTTERFLIES OF NEW ENGLAND. tween the edges of some of the abdominal segments, holding on by which the tail was withdrawn, then elongated and the cremaster thrust into the mass of silk prepared for it. The schematic figures, PI. 87, fig. 20 a-c indicate this view of pupation. This is true to a certain extent with some butterflies ; that is, these ac- tions take place, but they are not true of others and are insufficient to effect the end in all, as the seizure of the skin when it occurs is largely accidental and before it is seized the skin has so far retreated toward the tip of the body that the chrysalis would fall from its enclosure but for other important connections between the larval skin and the B. Fig 3. Fig. i. For in the ecdysis the lining membranes of the alimentary canal and the respiratory vessels are pulled out and cast off with the old integument, and that of the intestinal tube now plays an important part, serving as a liga- ment to unite the two so long as union is necessary; and in addition there is secreted between the old and new membranes at the extremity of the body a mucous, which, in the parting of the two, envelopes the rectal Fig. 1. Schematic figure of the changes in Anosia plexippus. A, soou after suspension; B, a few hours Liter, the needle separating the forming membrane from the sustalners; C, just before larval skin splits, with retain- ing membrane loosened and showing Its con- nection with both larval and pupal rectum. In all the figures the forming chrysalis Is shaded, and the Intervening space between it and larval skin is dotted. Pig. 2. Shrunken larval skin of Euvanessa antiopa, cut open from the back. Fig. 3. A, Chrysalis of Xanthldia nlcippe; B, hinder end of that of Anaea audria; C, of that of Anosia plexippus. Fig. 4. Tall of chrysiilis of Euvanessa anti- opa, just before withdrawa
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Keywords: ., bookauthorscuddersamuelhubbard1, bookcentury1800, bookdecade1880
