69 



(Pag. 131.) 23. L. decolor [= Linyphia decolor Westr. 1861]. 



I do not think that this species is described either in Black- 

 wall or Menge. Only one specimen has as yet been met with. 



(Pag. 132.) 24. L. nigrina [= Linyphia nigrina Westr. 1851]. 



Sijn.: 1851. Linyphia nigrina Westr., Forteckn. etc., p. 38. 



1853. ,, pulla Hlackw., Descr. of some newly discov. spec, of Aran., 

 in Ann. and Mag. of Nat. Hist., 2 Ser., XI, p. 19. 

 1864. „ „ id., Spid. of Gr. Brit., II, p. 234, PI. XVI, fig. 156. 



1866. Bathyphantes terricolus Menge, Preuss. Spinn., I, p. 112, PI. 19, 



tab. 38. 



The Rev. 0. P. Cambridge has sent me specimens of this species 

 under the name of L. pulla Blackw. , and has also declared the speci- 

 mens of L. nigrina, -which I had sent to him, identical with L. pulla. — 

 In this species the cephalothorax is usually dark brown, considerably 

 darker than the pale, red -yellowish legs, but its colour varies, and 

 examples sometimes occur, in which the cephalothorax is of the 

 same light colour as the extremities, only at the edges darker. The 

 colour of the abdomen varies much: it is sometimes (both in cT 

 and ?) black or brown above, with a row of yellowish angular 

 lines, of which the hindermost frequently coalesce to a large, on 

 both sides dentated spot; sometimes (in 9) ft ' s yellowish on the 

 upper part, with two or three angularly bent bands or marks in 

 front, behind which follows a row of free or coalescing black spots on 

 both sides, which rows converge to the anus. The first of the an- 

 gular bands is frequently replaced by a smaller, black central spot; 

 sometimes they are altogether absent, in which case the whole back 

 of the abdomen is yellowish, with only a band of black spots on 

 each side in the posterior portion. The sides and belly are black 

 or brownish, the region in front of the vulva often lighter. The 

 genital opening is limited by two short, brown ribs diverging back- 

 wards: from the lighter interval, behind, proceeds a fine, almost 

 cylindrical, light yellow process directed backwards. — The lamina 

 httbi (pars digitalis or tarsalis) of the male's palpi has at its base, 

 on the outer (superior) margin, a long, twice bent, fish-hook-like 

 process (the accessory lamina), and the bulbus at its extremity a 

 long, circularly curved, black spine. 



