NATURAL HISTORT. 209 



■water, and a third group are parasitical, and live on 

 different animals. 



The terrestrial species are in general solitary ani- 

 mals, and of a forbidding aspect; many of them 

 shunning the light, and living in concealment. Several 

 of these are poisonous, and their bite dangerous. Many 

 have mandibles, which exercise the office of a sucker, 

 and others have an isolated sucker, oftep, however, 

 joined with mandibles and palpi. 



The genus Scorpio (scorpions) furnishes a species 

 known in these islands as the Scorpio a/er. The body 

 is blackish, with the joints of the feet and antennae 

 white. It grows sometimes to the length of four or 

 five inches, but when they breed in houses they do 

 not then attain above half the size before mentioned. 



Among the species termed, by Latreille, sedentary 

 spiders, we shall notice the silk spider {Tetragnaiha 

 extensa). The body is of a light brown colour, with 

 diagonal stripes of green, its fore feet of a yellowish 

 colour. It is about two inches in length. Its legs 

 are very long and slender, the first pair longest, then 

 the second, and afterwards the fourth. It spins a 

 large silky web of very firm texture, equal, if not 

 superior, to that of the silk-worm, but which is put 

 to no manner of use in Bermuda. This species is 

 common in our woods. They make their webs with 



