280 INSECT TRANSFORMATIONS. 



however, though it forms a silken suspensory girth 

 similar to the Lyccenceidce, constructs it in a difTerent 

 manner. Instead of retracting its head, it takes 

 advantage of its great pliability, and bending itself 

 nearly double, fixes a thread, carrying it over to the 

 other side simply by turning its head. It repeats 

 this process a great number of times, till it has 

 formed a packet of threads sufficient for its cincture. 

 It then stretches its head out into a right hne with 

 the body, and remains in this position till it casts its 

 skin. The usual position of the chrysalides belong- 

 ing to the faniily [PapUiomdcz, Leach) in question, 

 is horizontal; but they frequently also hang vertically, 

 and at different angles. We possess one of the large 

 garden white butterfly {Pontia Brassicie), which 

 was bound horizontally on the upper surface of a 

 leaf of the abele tree {Populus alba), being laid, and 

 not hung, as is almost the invariable practice of the 

 species. The leaf, moreover, is drawn together in 



o, Caterpillar of the black-veined white butterfly spinning its 

 suspensory band, b, chrysalis horizontally bound to a branch. 

 c, the butterfly (Pieris Cratagi,) smaller than in nature. 



