536 



on both sides, behind, are larger and more transverse. — A V X. 

 brevitarsis Sim. 1 ), sent me by Simon himself, is extremely like this 

 X fucatus Can. et Pat. ; what has been said about this last is also 

 true of X. brevitarsis , except that X. brevitarsis is something larger 

 (the cephalothorax 4'/, and the l:st and 2:nd pairs of legs 11 mil- 

 lim. long), with 6 pairs of spines on the under side of the tibiae of 

 the l:st pair; moreover the area of the 4 centre eyes seems to me 

 a hair's-breadth broader behind than before, and the bristles on the 

 cephalothorax somewhat shorter and stouter: among those situated 

 around and between the eyes, some are slightly thicker towards the 

 apex, which is not the case in Canestrini's species. Not only the 

 patellae of the anterior legs, but also their tibiae and metatarsi are 

 black on the under side. The vulva appears to have exactly the 

 same form as in X. fucatus. Whether X. brevitarsis be or be not 

 the same species, which I, with Canestrini and Pavesi, have here 

 called X. fucatus, must be left to future researches to decide. — It 

 seems that X. fucatus is met with also in Sweden: vid. sup., p. 251. 



(Pag. 522.) Xystica bufo. 



Xyslicus bufo (Duf.) 1820. 



Syn.: 1820. Thomisus bufo Duf., Descr. de cinq. Arachn. nouv., in Ann. gen. 



d. Sc. Phys., V, p. 206, PL LXXVI, fig. 4. 

 1837. „ „ Walck., H. N. d. Ins. Apt., I, p. 506. 



In one full-grown female of this species (from Spain), whose 

 cephalothorax is 4 millim. long, the length of the l:st pair of legs 

 is 12 millim.; in another, where the cephalothorax is 3% millim., 

 those legs are 11 f. 2 millim. long; so that the first pair is about 3 

 times as long as the cephalothorax. The tolerably short, scattered 

 bristles, with which the cephalothorax is furnished, are sharp, not 

 blunt. The tarsi are of the usual form , many times as long as they 

 are broad. The tibiae of the l:st pair have on the under side two 

 rows of spines, 5 in the one, 3 in the other row. The vulva is a 

 comparatively pretty large area, enclosed by an elevated margin, and 

 divided by two narrow longitudinal furrows into three low ridges, 

 of which the centre one is the longest and broadest. The legs are 

 paler on the under than on the upper side, the metatarsi and tarsi 



l ) Simon , Aran. nouv. cm peu comius du midi de l'Eur. , in Mem. de la 

 Soc. Boy. d. Sc. de Liege, 1870, pp. 49, 50. 



