148 



WALCKENAERA MONOCEROS. 



Theridium monoceros, Wider., Zool. Misc. Mus. Senck, p. 230 



(236) pi. xvi., fig. 3. 

 Walckenaera monoceros, Blackio., Spid. Great Brit, and Irel. 

 p. 291, pi. xx., fig. 205. 

 The male of this curious little spider measures 1 line in length. 

 The eephalo-thorax is reddish-brown, the legs roddish-yellow, 

 and the abdomen deep yellowish-brown. It is allied to both the 

 fore-going spiders, but may be distinguished without difficulty 

 by the small projecting horn-like process, issuing from tho middle 

 of the ocular area, being of a conical form dirocted rathor down- 

 wards, and furnishod with numerous divergent, and upturned, 

 elavate hairs. The eyes are also smaller and describe an area 

 broader in proportion to its length than in Walckenaera cuspidata 

 and W. unicornis. The palpi and palpal organs are of peculiar 

 and characteristic structure. The radial joint has a large, curved, 

 tapering apophysis, whose obtuse point is bifid or notched, at 

 its extremity on the inner side, and has its point directed out- 

 wards, and in front is a smaller, dark-coloured, spine-like apophysis 

 opposed to the other. The palpal organs are complex, with a 

 strong spine curved in a circular form at their extremity. 



I met with several examples (of the male only) of this very 

 rare spider, under stones and pieces of rock near Pennsylvania 

 Castle, Portland, in the autumn of 1859; since which time I 

 have not again found it. I had previously found a single 

 example at Southport, in Lancashire. 



WALCKENAERA TUNCTATA. 



Walckenaera punctata, Blackw., Spid. Great Brit, and Irel , p. 

 295, pi. xx., fig 210. 



The malo is rather more than 1 line in length, and the female 

 is about 1-1 0th of an inch. 



The eephalo-thorax is of a very dark, slightly reddish, brown 

 colour ; the caput has no distinct elevation, but is rather raised, 



