1873.] SPIDERS FROM ST. HELENA. 223 



The digital joint is rather small and of a narrow-oval form, its 

 convex side being turned inwards. From its base springs a rather long, 

 tapering, almost straight, and nearly perpendicular horn or apophysis, 

 its extremity being bluntish-pointed and black ; the length of this 

 horn about equals half the length of the digital joint, but exceeds its 

 breadth. The palpal organs are well developed and prominent, con- 

 sisting of a somewhat oval, convex, corneous lobe, with a detached 

 curved process at the base on the outer side, and an obtuse one at 

 the extremity projecting forwards just beneath the fore extremity of 

 the digital joint ; and springing from it is a small curved sharp- 

 pointed spine. 



A remarkable similarity in the form and structure of the palpi and 

 palpal organs exists between 31. digna and 31.(Tetragnatha) decor ata 

 (Bl.), figured, Linn. Soc. Journ. x. pi. 13. figs. 66, 67 ; but in other 

 respects the species are totally distinct. 



Fam. Uloborides. 



Genus Uloborus. 

 Uloborus williamsii. 



Orithyia ivilliamsii, Bl. Ann. Nat. Hist., Nov. 1858. 

 Adult females of this Spider were contained in Mr. Melliss's last 

 two collections from St. Helena. 



Fam. Thomisides. 

 Genus Xysticus (Koch). 

 Xysticus grammictjs. 



Xysticus grammicus, Koch, Die Arachn. Bd. iv. p. 57, tab. 124. 

 fig. 285. 



Adult males and numerous females were received from St. Helena ; 

 some of the latter sex were accompanied by their nests and egg- 

 cocoons, which last were sewn up in a leaf whose edges were brought 

 together, forming a neat little bag. The male is much smaller and 

 darker-coloured than the female. 



Fam. Lycosides. 

 Genus Lycosa. 

 Lycosa (Trochosa) dolosa, sp. n. 



Adult female, length 7| lines. 



The cephalothorax of this fine species is broad-oval, truncate 

 before, constricted laterally forwards ; the caput is roundly convex, 

 and the profile line from the thoracic junction to the middle row of 

 eyes is rather arched ; it is of a dark reddish yellow-brown colour, 

 the caput being the darkest; from between the hinder pair of eyes 

 three lines of pale hairs run backwards to the thoracic junction, the 

 two lateral ones of these lines enclose a pointed oval space which is 



