242 



is so curved as almost to resemble a boot, the shaft of which is 

 but little thicker than the pointed foot, which is directed obliquely 

 forward and inward. The second process is not slenderer than the 

 first, also of about uniform thickness, and its short blunt extre- 

 mity is curved inward and backward towards the foot of the boot; 

 high above the bend, near its base, it gives off a sharp tooth in 

 the opposite direction, which however is visible only in a particular, 

 favourable position , and can therefore easily escape observation. The 

 lamina bulbi has on its outer edge, at the base, a diaphanous pro- 

 cess with a black bristle along its anterior side, much as in X. 

 cristatus. The outer process of the pars tibialis is short, thick and 

 pointed, as in X. cristatus. The process on the under side of the joint 

 is longer than it is broad, broadest at the base, narrowed in the 

 middle, with the posterior edge straight or slightly convex, the an- 

 terior concave: at the truncated extremity again it is somewhat di- 

 lated, and drawn out in front into an acute angle. The vulva in 

 the only female specimen I possess of this species appears to be 

 formed af a pale-coloured, somewhat transversal fovea, imperfectly 

 divided into two by a triangular process extending backwards from 

 its anterior border. 



(Pag. 420). 5. Th. calcaratus [_ = Xysticus calcaratns (Westr.) 1861]. 



Syn.: ?1851. Thomisus audax Westk., Aran. Suec, p. 422 (ad part.: $ ; mow 



cf» nec "Var. V). 



This spider, of which Westring sent me the type-specimen of 

 his description, can, as regards its colour, scarcely be distinguished 

 from dark individuals of X. cristatus, but is very remarkable for the 

 form of its palpi, which bear a close resemblance to those of X. 

 sabulosus cf. The tibial joint's lateral process is rather short, trian- 

 gular and somewhat blunt at the extremity; the lower process is 

 not, as usual, directed downwards, but forwards, parallel to the la- 

 teral process; it is slenderer than in the allied species, thin, and 

 slightly dilated towards the extremity, which is produceddo wnwards 

 and somewhat inwards, so that the process, when seen from the 

 upper edge, has the form of a narrow spur with the extremity curved 

 inwards. The lamina has a process on its margin far in front of 

 the apex of the tibial joint's lateral process; the bulbus has no pro- 

 jecting processes on the under side towards the base, but at its 

 apex it has a fine and rather long spine curved forwards. 



