SPIDERS. 271 



the Diplopoda, the legs belonging either to one of the anterior or 

 of the posterior segments of the body are modified into prehensile 

 hooks which serve to secure the female. In some species of lulus 

 the tarsi of the male are furnished with membranous suckers for 

 the same purpose. As we shall see when we treat of Insects, it is 

 a much more unusual circumstance, that it is the female in Litho- 

 bius, which is furnished with prehensile appendages at the ex- 

 tremity of her body for holding the male.^" 



^ Walckenaer et P. Gervais, 'Hist. Nat. des Insectes: Aptsres," 

 torn. iv. 1847, pp. 17, 19. 68. 



