LEPIDOPTERA. 



143 



nilles,"* the scaly legs of the caterpillar of the oak and elm. 

 The others are membranous, fleshy, generally conical or cylin- 

 drical, contractile, and taking, according to the will of the animal, 

 very different forms. Fig. 95 represents, after the same memoir 

 of Reaumur's, the different forms of the membranous legs of 



Fig. 95. Membranous legs of the Silkworm (Bombyz mori) . 



the Silkworm caterpillar. This plate gives a sufficiently good 

 idea of the shape of these organs, and of the hooks, circular or 

 semi- circular, with which they are furnished. 



In Fig. 96 are represented, after the same author, two mem- 

 branous legs of a large caterpillar, 

 of which the hooks of the feet are 

 fastened into a branch of a shrub. 



Caterpillars have from two to ten 

 false legs, the scaly legs being always 

 six in number. The pro-legs, as the 

 fleshy ones are called, are divided 

 into hinder and intermediate. The 

 former are two in number ; the in- 

 termediate are rarely more than 

 eight in number. 



In the caterpillars which have the 

 full number of legs that is to say, 

 sixteen there are two empty spaces, 

 where the body has no support : the 

 one between the legs and the pro-legs, formed by the fourth and 

 fifth segments ; the other, between the intermediate pro-legs and 

 the anal legs, formed by the tenth and eleventh ring. 

 * Tome i. p. 164, Plate iii. Figs. 1, 2. 



Fig. 96. Membranous legs of a large 

 Caterpillar embracing a twig. 



