NERIENE. 
265 
black hue; the cubital and radial joints are short, the latter being much the stronger; the 
digital joint is somewhat oval, with a bold, conical prominence in front, and a small one at the 
base, on the inner side; it is convex and hairy externally, concave within, comprising the 
palpal organs, which are highly developed, complicated in structure, and of a dark, reddish- 
brown colour. 
In February, 1841, adult males of Neriene Jlavipes were captured on rails at Oakland. 
Neriene parva. PI. XVIII, fig. 179. 
Neriene parva, Blackw., Linn. Trans., vol. xviii, p. 647. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, p. 22. 
Argus minimus, Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 512. 
Length of the male, ^th of an inch; length of the cephalo-thorax, ^th, breadth, ? ’ 5 th ; 
breadth of the abdomen, ^th; length of an anterior leg, ^th; length of a leg of the third 
pair, reth. 
The cephalo-thorax is slightly compressed before, rounded on the sides, convex, glossy, 
with an indentation in the medial line; the falces are conical, armed with teeth on the inner 
surface, and a tooth-like process in front, near the extremity; they are inclined towards the 
sternum, which is broad and heart-shaped; the maxillae are strong, 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 are of a brown colour, the falces and lip being the darkest. The palpi have a 
brown hue, the radial joint being much the darkest; the cubital and radial joints are short; 
the latter is produced in front, very prominent, and pointed, with a large process near its base, 
on the inner side; the digital joint is oval, convex and hairy externally, concave within, 
comprising the palpal organs, which are highly developed, complicated in structure, with a 
prominent process at the upper part, on the outer side, one or two small, pointed ones at the 
extremity, and 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 dark- 
brown colour ; that of the branchial opercula being pale-yellow. 
Specimens of this very minute spider were detected on rails at Oakland in January, 1837; 
they were all males, and had the palpal organs perfectly developed. 
Neriene munda. PI. XVIII, fig. 180. 
Neriene munda, Blackw., Linn. Trans., vol. xviii, p. 642. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, 
p. 268 . 
Argus mundus, Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 511. 
