CLASSIFICATION 399 



Africa, and eight of these are natives of Britain. D. arundinacea 

 is very abundant, especially in heather. It is about an eighth of 

 an inch in length. D. uncinata is also often met with. 

 Amaurobius, of which about eighty species are known, includes 

 some species of much larger size. Three species are native to 

 this country, A. ferox, A. similis, and A.fenestralis. A.ferox is 

 a large and rather formidable-looking spider, more than half an 

 inch in length, with powerful chelicerae. It is found under 

 stones and bark, and in cellars and outhouses. A. similis is the 

 commonest species in England, though A. fencstralis somewhat 

 replaces it in the north. They are smaller than A. ferox, but 

 are found in similar situations. 



Fam. 18. Psechridae.--This is a small family of cribellate 

 spiders, consisting only of two genera, Psechrus and Feccniit., and 

 some eight species, all natives of Southern Asia and the adjacent 

 islands. The two species of Psechrus are large spiders. They 

 make large domed webs, which they stretch between trees or 

 rocks, and beneath which they hang in an inverted position. 



The calamistrum of these spiders is short, about half the 

 length of the fourth metatarsus. 



Fam. 19. Zodariidae (Enyoidae). In this family are in- 

 cluded a number of remarkable exotic spiders, most of them 

 somewhat Drassid-like in appearance, but generally with thive- 

 clawed tarsi. The group appears to be a somewhat heterogeneous 

 one, the twenty genera of which it consists presenting rather a 

 wide, range of characteristics. 



Cydrela is an African genus of moderate sized spiders, contain- 

 ing five species of very curious habits. They seramlile about and 

 burrow in the sand, in which, according to Simon,' they appeti- 

 te swim, and their chief burrowing implements are their pedi|ialpi. 

 which are specially modified, the tarsi in the female bristling 

 with spines, and being armed with one or more terminal da us. 



Lr/i<'x( J^ichesis') includes some larger pale-coloured spiders found 

 in Iv^ypt and Syria, under stones in very hot and dry localities. 



Storena has representatives in all the tropical and sub-tropical 

 parts of the world, and numbers about, lif'ty specie;-. They are 



of moderate si/e, with integuments si >th and glossy or finely 



sh a greened, usually dark-coloured, with white or yellovt spots on 

 the abdomen. //>//// i/i/m.s (Fig. 206) is also African. 



1 Hist. .\,it,. des .//. i. i>. 1 16. 



