223 



for the species before us: the genus Ghiracanthium will certainly 

 hereafter be kept perfectly separate from Chbiona, so that no collision 

 between the names need be apprehended, even if the name Chir. erra- 

 ticum (Walck.) should be preferred to Chir. carnifex (Fabb.). — Westring 

 has not observed the long, pointed process armed with two teeth at 

 the upper edge, which springs from the apex of the tibial joint of 

 the males palpi below the processes described by Westring ; it is 

 indeed often concealed by the lamina's egde. 



(Pag 398.) 6. C. trivialis [>= dubious borealis ■.]. 



This species, of which Westring lent me a couple of (dried) 

 specimens, and of which only the female is known, is not the spe- 

 cies, which, according to L. Koch, ought to be called C. trivialis C. 

 Koch, but appears to be most nearly related to C. frutetovum L. Koch 

 and C. alpica id. (Die Arachn.-fam. d. Drassiden, p. 344 and 347). 

 From the former it seems chiefly to differ by its darker colour and 

 by the black lateral border to the cephalothorax , from the latter by 

 the metatarsi of the 4 th pair being nearly double as long as those of 

 the 1 st , from both by the appearance of the vulva. The vulva in 

 Westring's spider consists of a black area, the posterior edge of 

 which, formed by the rima genitalis, is divided by two small inci- 

 sures or furrows into three lobes, of which that in the middle is nar- 

 roicest, not broad and rounded at the extremity. The cephalothorax 

 is nearly 3 millim., the mandibles l'/ 4 , the 1 st pair of legs 7, the 

 4 th 9'/ 2 millim.; the metatarsi of the 1 st pair are l'/ 3 millim., those 

 of the 4 th 2'/ 2 , tibia + patella of the same pair 3 millim.; the eyes 

 of the anterior row are at equal distances from each other, the po- 

 sterior centre eyes rather farther from each other than from the la- 

 teral eyes; the tibiae of the 3 rd pair have 1, 1, those of the 4 th pair 

 1, 1, 1 spines (the last, at the extremity, inward, is curved) on the 

 under side. These notices are made from Westring's original spe- 

 cimens. For the present I look upon this spider as a separate spe- 

 cies and call it C. borealis. Two other specimens, which appear to 

 belong to C. borealis, have been given me by Al. v. Nordmann, the 

 one from Finnland, the other from Kittila in the Finnish Lapp- 

 mark. 



With respect to the real C. trivialis C. et L. Koch, vid. infra 

 p. 225, C. pollens Westr. 



