88 ON NEW AND RARE BRITISH ARACHNIDS. 



Falces long and strong, similar to the caput in colour, and 

 near fore surface seems to be covered thickly with minute 

 granulations. 



Maxillm rather long, strong, straight, a little inclined to 

 the labium, obliquely truncate at their extremity, and similar 

 to the falces in colour. 



Labium oblong, about half the length of the maxillae, and 

 like the sternum in colour. 



Sternum dark brown, of ordinary form. 



Abdomen black, with obscure traces of some whitish 

 markings on the upper side, but no pattern was traceable. 

 In front of the ordinary spinners is the transverse one (or 

 Crivellum), rather dark, and subdivided ; this is always 

 found, correlated with the Calamistrum on the metatarsi of 

 the fourth pair of legs (though in the adult males one or both 

 these portions of structure are either absent altogether or are 

 very difficult to trace). 



In the absence of adult examples it is impossible to be quite 

 certain as to the species of this spider. Its occurrence in 

 Devonshire is of much interest ; and I feel very little doubt 

 but that by careful search, where it occurred, it would turn up 

 pretty frequently. The usual habitat of these spiders is 

 under pieces of wood or stone or other shelter in dry places ; 

 perhaps dried sea-weed along the coast, left by high tides and 

 storms, would be a likely situation to find it in. As noted 

 above (p. 73) M. Simon now includes this genus under 

 " Amaurobius." 



Theridion salvum, sp.n. 



Adult female length, 1 line. 



Cephalothorax of normal form ; colour, dull yellowish 

 brown ; caput and a tapering band thence to the posterior 

 margin suffused with black-brown ; and a narrow marginal 

 border of the same hue with indications of brown converging 

 lines on the sides. 



