257 



X. brevipes, but may, I hope, be distinguished from it by means of 

 the characteristics indicated in its description (see the foot-note). 



(Pag. 441). 16. Th. SCabriculllS [ = Xysticus scabriculus (Westb.) 



1851]. 



Syn.: 1851. Thomisus scabriculus Wbstr., Fiirteckn. etc., p. 50. 

 1856. Xysticus „ Tiior., Eec. crit. Aran., p. 111. 



This remarkable spider is nearly allied to Thorn. daveatus 

 Blackw., which however is quite a different species, as one may at 

 once see from Blackwall's description of the male's palpi. Black- 

 wall's Th. daveatus is destitute of the coarsely rugose longitudinal 

 ridges on the cephalothorax , that distinguish X. scabriculus: its ce- 

 phalothorax is chagrined with small thickly set elevated points; 

 the diameter of its anterior lateral eyes is greater than the distance 

 between them and the anterior centre eyes, not less, as is the 

 case in X. scabriculus. Whether Th. daveatus Walck. 1837 s ), 

 stated to be synonymous with Thom. kirtus Latr. 1819 3 ), be the 

 same as the spider which Blackwall describes under that Walckenae- 

 rian specific name, appears to me very uncertain; the last-named 

 species may however for the present be called X. daveatus (Blackw.). 



The tibial joint of the palpus in X. scabriculus d 1 is, on the 

 outer side, produced into a coarse, broad process, somewhat dilated 

 towards the obliquely truncated and, in its middle, slightly notched 

 extremity, of which the anterior acutangular corner is somewhat 

 drawn out forward; this process is directed downward, outward and 

 slightly forward; on the under side of the joint projects a more 

 slender process or blunt hook, directed downwards, but much curved 

 forwards and , at the extremity, outwards. The bulbus has on its 



lateralis distant. — Mas saltern non in femoribus l:mi paris tantum, sed etiam in 

 sequentibus binos aculeos habet; femora ejus omnia et patellae posteriores , ut et ti- 

 biae posteriores, ad basin fusco-maculata sunt, pedes praeterea fusco-testacei ; in % 

 pedes magis maculati. Abdomen feminae setis raris tenuibus apice clavatis sparsum. 

 — Cum X. claveato (Blackw.) et X. scabriculo (Westr.), ut qui setas clavatas 

 etiam in pedibus habeant, non facile confundi potest X. pusio. 



1) Spid. of Gr. Brit., I, p. 87, PI. IV, fig. 52. 



2) H. N. d. Ins. Apt., I, p. 510. 



2) Nouv. Diet. d'Hist. Nat., 2" Ed., XXXIV, p. 41 (sec. Walck.); Conf. 

 also "Thorn, hirtus Latr.?" Sav. et Aud., Descr. de l'Egypte, 2e Ed., XXII, p. 

 397, PL VI, fig. 11. 



