213 



At S8derkf>ping and at Satra I have met under stones with a 

 few specimens of a Xyntims, which seem to be females to Thorn, 

 oalwratiis Westr. They agree exactly with a J, which Westring 

 sent me under the name cf "77*. audax £," wherefore I have also, 

 although with a note of interrogation, taken up this latter name 

 as a synonym to X. calcaratus. These females are in size and co- 

 lour very like the darker varieties of X. bifasciatus, but are distin- 

 guished by a more truncated coutour of the forehead and by the ap- 

 pearance of the vulva, which is composed of two pretty large , rounded 

 or oval, dark, tolerably deep foveae, separated by a septum, which, 

 proceeding from their common anterior margin, is broader at the 

 hue, but afterwards narrowed; they are continued backwards by a 

 small, shallower depression. The cephalothorax is 3'/.,— 3'/, millim. 

 long, the patella + tibia of the 4 th pair 3'/ a — 4 millim. The mar- 

 king of the upper part is similar to that of X. cristatus and X. 

 Kochii (viatieus); the cephalothorax is surrounded by a fine, pure 

 white line, the legs have on the upper side, along the greater part 

 of their length, a narrow whitish line, which is particularly conspi- 

 cuous on the first two pairs. The thighs of the two posterior pairs, and 

 frequently even those of the two fore pairs , have a similar line on 

 the under side. After the laying of the eggs, the colour becomes 

 still darker, and the pale indented band along the back of the ab- 

 domen almost disappears. The animal then bears a striking resem- 

 blance to the spider, which C. Koch in Die Arachn., XII, Tab. 

 CCCCXIV, fig. 1012 has figured as a variety of "X.lanio." — Thorn. 

 Gunbridgii Blackw. 1858 (Descr. of six newly disc. Spid. etc, in Ann. 

 and Mag. of Nat. Hist., 3 Ser., 1, p. 426; Spid. of Gr. Brit., I, 

 p. 81, PI. IV, fig. 47) appears to be nearly allied to X. calcaratus; 

 Mr Cambridge, to whom I had sent one of the spiders considered 

 by me to be females of A'', calcaratus, assures me however that they 

 are different from 2'hom. Cambridgii Blackw. (of which species 

 Blackwall has only described the female. 



(Pag. 422). 6. Th. audax [= Xysticas luctuosns (Blackw ) 1836 



+ Xyslicus calcaratus Westb. 1861?]. 

 "Mas" et "Var. V: 

 Syn.: 1836. Thomisus LUCTUOSUS Blackw., Charact. etc., in Lond. and Edinb. 



Phil. Mag., 3 Ser., VUI, p. 489. 

 1856. Xy.sticus convexus Tn.m., Kec. crit. Aran., p. 110. 

 1861. Thomisus luctuosus Blackw., Spid. of Gr. Brit., I, p. 78, PI, 



IV, fig. 45, 



