280 INSECT TRANSFORMATIONS. 



however, though it forms a silken suspensory girth 

 similar to the Lyccenceidce, constructs it in a different 

 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 line with 

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

 skin. The usual position of the chrysalides belong- 

 ing to the family (Papilionidce, 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 Brassicce), 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 



cr, Caterpillar of the black-veined white butterfly spinning Its 

 suspensory band. 6, chrysalis horizontally bound to a branch. f 

 c, the butterfly (Pieria Cratcegi,) smaller than in nature. * 



