NERIENE. 
255 
its base. The palpi resemble the legs in colour ; the cubital and radial joints are short; the 
former has a long bristle at its extremity in front, and the latter, which is the stronger, is 
gibbous underneath at the base; the digital joint is somewhat oval, with a bold, conical pro¬ 
tuberance at the upper part in front, and a prominent lobe on the outer side; it is convex 
and hairy externally, concave within, comprising the palpal organs, which are highly developed 
and complicated in structure; a strong, curved, obtuse process, slightly serrated on its 
exterior edge, is situated on the outer side of the upper part; another curved process, whose 
point is enveloped in membrane, extends from the upper*part to the extremity of the joint, 
and within its curvature a small, dentated spine occurs; these organs are of a red-brown 
colour. 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 hue ; and the colour 
of the branchial opercula is pale-yellow. 
Adult males of this species were taken in February, 1837, under detached pieces of rock, 
slightly imbedded in earth, in woods about Llanrwst. 
Neriene viaria. PI. XVIII, fig. 171. 
Neriene viaria, Blackw., Linn. Trans,, vol. xviii, p. 645. 
— Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, p. 21. 
Argus viarius, Walck., Hist. Nat. des Insect. Apt., t. iv, p. 512. 
Length of the male, -,' a th of an inch; length of the cephalo-thorax, ~th, breadth, ^th; 
breadth of the abdomen, Ath ; length of an anterior leg, 5 3 s ths ; length of a leg of the third 
pair, gth. 
The anterior eyes of the four intermediate ones forming the trapezoid are much the 
smallest of the eight. The cephalo-thorax is oval, moderately convex, glossy, with slight 
furrows on the sides, converging towards an indentation in the medial line ; the falces are 
powerful, conical, armed with teeth on the inner surface, rather divergent at the extremity, 
and inclined towards the sternum, which is broad, convex, and heart-shaped; the maxillae are 
inclined towards the lip, which is semicircular and prominent at the apex; the legs are 
provided with hairs and a few slender spines, 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 are of a brown colour, 
the margins of the cephalo-thorax and the lip being the darkest, and the legs and maxillae 
the palest. The palpi resemble the legs in colour; the cubital and radial joints are short; 
the former, which is the stronger, has some long hairs at its extremity in front, and the latter 
is gibbous underneath at the base ; the digital joint is somewhat oval, with a large lobe on 
the outer side ; it is convex and hairy externally, concave within, comprising the palpal 
organs, which are highly developed, complicated in structure, very prominent, and of a 
reddish-brown colour. The abdomen is oviform, convex above, projecting over the base of 
the cephalo-thorax; it is thinly clothed with hairs, glossy, and of a dark-brown hi*e, 
approaching to black; and the colour of the branchial opercula is pale, yellowish-brown. 
34 
