245 



The male is distinguished by his dark colour (the fore tibiae 

 are dark brown, scarcely paler than the thighs), his short , strongly 

 arched cephalothorax , and especially by his palpi, the pars tibialis of 

 which has the thin lateral process so long, that it almost reaches to 

 the middle of the lamina, and terminating in a sharp, somewhat inward 

 curved point; it has, when seen from the edge, the appearance of a 

 fine, pointed spine curved uniformly inward; under the anterior portion 

 of this process, and almost at right angles with its apex, appears 

 a little process projecting from the margin of the lamina. The 

 inferior process of the tibial joint is somewhat narrow, longer than 

 it is broad , longitudinally excavated on the side that is turned inwards 

 and forwards, almost semi-pipe-formed, so that its truncated ex- 

 tremity, seen from below, appears semicirculary emarginated, or, as 

 Blackwall says, "terminating in the form of a crescent." The pro- 

 cess also exhibits a longitudinal depression on the outer "side. The 

 bulbus has on its under side, in the middle and towards the inner 

 side, a small elevation '). 



(Pag. 424). 7. Th. cinereilS [= Xysticus crislatus (Clerck) 1757, 



Var.] 



On this species see above p. 237 under Th. cristatus Westr. 



1) Mr L. v. Kempelen has sent me a male Xystiem, which is very like X. 

 Iwtuosus , but may be easily distinguished by its palpi having the process at the 

 extremity of the outer side of the tibial joint much shorter, not reaching one 

 fourth of the length of the lamina, and the inferior process of the same joint 

 broad and cloven at the extremity, I call this species X. Kempelenii.\ 



X. Kempelenii N. — Mas. Cephalothorax c:a 2 '/ 2 millim. longus, in dorso ar- 

 cuato-convexus, parum pilosus, fronte truncata; nigro-fuscus , antice V magnoalbi- 

 canti notatus, ex lineis duabus, apicibus posticis fere parallelis, turn valde divarican- 

 tibuset sub-incurvis, formato; maculis praeterea paucis plus minus distinctis versus 

 marginem utrinque, ut et summo margine albicantibus; fronte fascia albicanti trans- 

 versa inter series duas oculorum ducta. Palpi testaceo-fusci , fusco-maculati , 

 parte tibial! duplo latiore quam longiore, versus apiceiu dilatata, apice lateris 

 exterioris, supra, paullo producto et mucrone vel spina brevi acuminata sub-in- 

 curva , anteriora versus et foras directa, parum ante basin laminae pertinenti, aucto ; 

 in latere partis tibialis exteriore , inferius , procursus latus , compressus excurrit , 

 oblique deorsum, foras et anteriora versus directus, versus apicem dilatatus, non 

 longior quam latior, apice sat profunde in lacinias duas obtusas inciso, lacinia 

 posteriore augustiore, anteriore sub-triangula. Lamina brevis, rotundata, procursu 

 in latere exteriore ad basin minuto , parum conspicuo , pone apicem mucronis partis 

 tibialis sito; bulbus subter paullo inaequalis, cochleiformis fere, in setam longam, 

 totum fere bulbum circumdantem exiens. Pedes fusco-testacei , femoribus, patellis 



32 



