PAPILIONINAE : JASONIADES GLAUCUS. 1297 



trifoliata (Abbot); young ash shoots (Fitch), and lilac, Syringa vulgaris 

 (Trouvelot), of the family Oleaceae ; and the Indian bean, Catalpa 

 bignonioides Walt. (Akhurst), one of the Bignoniaceae. Of the aj)eta- 

 lous division : sassafras, kS. officinale Nees (Staufter, Akhurst), one of the 

 Lauraceae ; hop, Humidus lupulus'Linn. (Lintner), one of the Urtica- 

 ceae ; hickory, Carya (Abbot), one of the Juglandaccae ; "black oak," 

 Qucrcus tinctoria (Fitch) , one of the Cupuliferae ; white birch, Betula alba 

 Spach(Guild, Scudder, Edwards), black bircli, Betula lenta Linn. (Fitch), 

 and common alder, Alnus incana Willd. (D'Urban, Emery), belonging 

 to the Betulaceae ; poplar, Populus tremuloides Michx. (Gosse, Guild, 

 Scudder, Fletcher), and willow, Salix (Gosse, Fletcher), belonging to 

 the Salicaceae. Mr. StaufFer ftirther says that he has found the caterpil- 

 lars on the vine (Vitis), where they were "detected in biting off entire 

 bunches of green grapes." But it is a question whether some other cater- 

 pillar may not have been mistaken for this, i. e., Chaerocampa. In the 

 Rural New Yorker (xiii : 109), however, as I learn from the notes of the 

 late Dr. Fitch, are figures of the larva, pupa and imago, apparently of 

 this species, "found on the grape vine at Lancaster, Penn." Han-is also 

 reports taking one on the burdock, Arctium lappa, a composite plant, but 

 as it changed to chrysalis at once it probably sought the plant merely for 

 pupation. Among these numerous plants, birch and poplar appear to be 

 the favorites in New England, Liriodendi-on in the middle states and the 

 different species of ash in the south. 



Habits of the caterpillar. \VTien young the caterpillar bites deep 

 excavations out of the edge of the leaf opposite to the spot where it rests, 

 weaving a bit of carpet on another part of the leaf, to which it retires 

 when not feeding, and arches its body, when quite young, much after the 

 style of Sphinx larvae, as if impatient to assume the swollen form of the 

 anterior part of the body which belongs to its maturer life ! As soon, 

 however, as it has moulted once, sometimes before moulting, it retu-es to a 

 fresh leaf and there weaves a new carpet, generally in the middle, but if 

 the leaf does not droop so as to enable it to rest on this carpet in a vertical 

 or nearly vertical position, it chooses a vertical part of the leaf and rests 

 here, head upward, so that all excrement falls to the ground and the cai'pet 

 remains clean. It feeds both by day and by night, but it does not now eat 

 the leaf it rests on, but goes off every few hours for a dinner on another 

 leaf, and indeed the same leaf it has dined on before, always finishing one, 

 on repeated visits, before attacking another. 



Soon after it has reached its fourth stage it changes its method of con- 

 structing its carpet, and it does so only just before that remarkable change 

 in its appearance occurs, by which it assumes the adult color and form. 

 Being about to put on the toga virilis it must needs set up a new estab- 

 lishment. The web or hammock now woven by the caterpillar, and upon 



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