NERIENE. 
263 
A male of this Neriene , having the palpal organs fully developed, was discovered among 
loose fragments of rock in a wood at Hendre House, near Llanrwst, in June, 1841. 
Neriene avida. 
Neriene avida, Blackw., Annals and Mag. of Nat. Hist., vol. xiii, p. 185. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, p. 22. 
Length of the female, ~th of an inch; length of the cephalo-thorax, ^th, breadth, ^nd ; 
breadth of the abdomen, ^th; length of an anterior leg, jth; length of a leg of the third 
pair, ^th. 
The anterior eyes of the four intermediate ones forming the trapezoid are the smallest of 
the eight. The cephalo-thorax is oval, convex, glossy, with a small indentation in the media} 
line; the falces are powerful, conical, rather divergent at the extremity, armed with teeth on 
the inner surface, and inclined towards the sternum, which is broad and heart-shaped; the 
maxillae are strong, enlarged where the palpi are inserted, and inclined towards the lip, which 
is semicircular and prominent at the apex ; the legs are provided with hairs, and the anterior 
and posterior pairs are equal in length; each tarsus is terminated by three claws; the two 
superior ones are curved and pectinated, and the inferior one is inflected near its base. These 
parts, with the palpi, have a brown hue; the legs and palpi, which are the palest, and the 
falces, maxillae, and extremity of the lip, having a tinge of red. The abdomen is oviform, 
convex above, projecting over the base of the cephalo-thorax; it is thinly clothed with 
hairs, glossy, and of a brownish-black colour; an obtuse process is connected with the 
anterior margin of the sexual organs; and the branchial opercula have a yellowish- 
brown tint. 
The male is rather smaller than the female, but it resembles her in colour. The anterior 
part of its cephalo-thorax is somewhat gibbous, and immediately behind each lateral pair of 
eyes there is a small indentation. The radial joint of the palpi is larger than the cubital, and 
projects a pointed apophysis from its extremity, in front; the digital joint is somewhat oval; 
its base is slender and curved outwards, and there is a lobe near the middle of its outer side ; 
it is convex and hairy externally, concave within, comprising the palpal organs, which are 
highly developed, prominent, complicated in structure, with a bold projection near the base, 
on the inner side, and a long, black, convoluted, filiform spine, enveloped in membrane, 
extending from the upper part beyond their extremity; they are of a reddish-brown colour. 
Males and females of this spider were found on rails at Oakland in April, 1839. 
Neriene timida. 
Neriene timida, Blackw., Annals and Mag. of Nat. Hist., vol. xiii, p. 183. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, p. 22. 
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