246 



(Pag. 426). 8. Th. ulmi [>= Xysticus ttlmi (Hahn) 1831 + Xysticus 



erraticus (Blackw.) 1834], 



Femina, et Mas ad part. (Xysticus ulmi): 



Syn.: 1831. Thomisus ulmi Hahn, Die Arachn., I, p. 38, Tab. X, tig. 30. 

 1831. „ „ id., Monogr. Aran., 6, Tab. 2, fig. A. 



1837. Xysticus ,, C. Koch, Uebers. d. Arachn.-Syst., 1, p. 25. 

 1856. ,, „ Thor., Eec. crit. Aran. p. 110. 



1861. Thomisus bivittatus Westr., Aran. Suec, p. 417. 

 1871. „ Westwoodii Cambr., Descr. of some Brit. Spid. etc., in 

 Transact, of the Linn. Soc, XXVLT, p. 403, PI. 

 54, no. 7. 



Mas ad part. (Xysticus erraticus): 



Syn.: 1834. Thomisus erraticus Blackw., Researches in Zool., p. 408 (sec. 



Spid. of Gr. Brit.). 



?1838. Xysticus bifasciatus C. Koch, Die Arachn., TV, p. 59 {ad part.: cf) 



Tab. CXXV, fig. 286. 

 1861. Thomisus erraticus Blackw., Spid. of Gr. Brit., I, p. 71, PL IV, fig. 40. 



The female that Westring describes under this name, is un- 

 questionably the same that Hahn calls Thom. ulmi. Under the male of 



et tibiis pedum 4 anteriorum piceis; internodiis omnibus, tarsis posterioribus ex- 

 ceptis, apice plus minus late infuscatis; pedes 4 posteriores subter praesertim evi- 

 dentius albicanti-variati; coxae omnes lineis duabus longitudinalibus notatae. Pedes 

 l:miparis 8y 2 millim. longi, 2:diparis iis paullo breviores; tibiae anteriores subter 

 paribus 3—4 aculeorum, et praeterea in latere utrinque aculeis 3 brevibus ar- 

 mata3; metatarsi subter 2 paria aculeorum et praeterea aculeum singulum in ipso 

 apice utrinque habent. Abdomen ferrugineo-fuscum , plaga antica inaequali albi- 

 canti fusco-variata , quae vitta, media longitudinali ejusdem coloris continuatur; 

 haec vitta valde inaequalis, hie illic in lineas transversas vel maculas divulsa, 

 interdum fere deleta; utrinque ab ea ab limbum abdominis clariorem rectis fere 

 angulis abeunt lineae 3—4 albicantes, postice fusco-marginatae ; supra anum prae- 

 terea lineae paucae albicantes transversa? conspiciuntur , posteriora versus gradatim 

 longitudine decrescentes. — Long. c:a 4'/2 millim. — Femina ignota. 

 Patria: Austria? (L. V. Kempelen). 



Another species, which by the form of the bulbus is allied to X. luctuosus, 

 but in which the exterior process of the tibial joint is much shorter, and obtuse, 

 not pointed, and the inferior process truncated at the extremity, is the following: 



Xysticus Ninnii N. — Mas. Cephalothorax c:a 2 '/ 2 millim. longus, dorso satis 

 aequaliter arcuato-convexo , fronte truncata; nigro-fuscus , margine concolore, linea 

 transversa albicanti inter oculos, vittaque media lata testacea; haec vitta antice 

 maculam amplectitur fuscam, sub-cuneatam , postice acuminatum, lineis duabus 

 albicantibus inaequalibus , sub-incurvis , postice appropinquantibus inclusam: vesti- 

 gia fasciae lateralis testaceae adsunt quoque. Mandibulse fuscae, testaceo-macu- 

 latae. Palpi testacei, fusco-punctati et -sub-maculati , parte femorali subter fusca: 

 pars tibialis versus apicem dilatata, latior quam longior, apice lateris exterioris 



