colour, the lip being much the darkest. The legs have a brown hue, which is palest at the
joints; the fourth pair is the longest, the first a little surpasses the second, and the third pair
is the shortest; the tarsi are terminated by three claws; the two superior ones are curved
and pectinated, and the inferior one is inflected near its base'. The palpi resemble the legs in
colour, and have a curved claw at their extremity. The abdomen is short, broad, thickly
covered with hairs, convex above, projecting over the base of the cephalo-thorax ; it is of a
dull, brownish-black colour interspersed with obscure, yellowish-brown spots, which are most
conspicuous on the sides, and the under part is the palest; a series of obscure, angular lines,
of a yellowish-brown hue, whose vertices are directed forwards, occurs on the upper part, in
tbe medial line of the posterior half; the spinners are arranged in a transverse row
immediately below the anus; the exterior ones are much the longest, triarticulate, and have
the spinning-tubes disposed on the inferior surface of the terminal joint; the second joint of
all the spinners has a reddish-brown tint, and that of the other joints is yellowish-white; the
sexual organs are prominent; and the branchial opercula have a whitish hue. Some
individuals of this species are much paler than others.
The male is rather smaller and darker coloured than the female. Its palpi are short; a
long, slender process, curved in a circular form at its extremity, occurs at the base of the
cubital joint, on the under side, and the radial joint projects from its extremity, on the under
side, a black, strongly curved, filiform spine directed outwards; the digital joint is oval, convex
and hairy externally, concave within, and comprises the palpal organs; these organs are
highly developed, not very complex in structure, with a black, filiform spine curved round
their inner side and extremity, and are of a brown colour. The convex sides of the digital
joints are directed outwards.
Adult females of Agelena montana were discovered in February, 1837, under stones on
Gallt y Rhyg, a mountain near Uanrwst, in Denbighshire; and in August, 1852, both sexes,
in a state of maturity, were found among moss in woods on the slopes of the same
mountain.
In transferring this spider to the genus Argus, with which it has no relation of affinity,
M. .Walckenaer has not perceived that it is specifically identical with the Halinia pusilla of
M. Koch.
A g e l e n a n a v a . PI. X , fig. 101.
Agelena nava, Blackw., Linn. Trans., vol. xviii, p. 623.
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. viii, p. 102.
Argus navus, Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 506.
Length of the female, ^th of an inch; length of the cephalo-thorax, ^th, breadth, ^ th ;
breadth of the abdomen, ^ d ; length of a posterior leg, ^ th ; length of a leg of the third
pair, nth-
The anterior part of the cephalo-thorax is compressed; the sides are rounded, depressed,
and marked with furrows converging towards an indentation in the middle, and a row of long
hairs, directed forwards, extends along the medial lin e ; the falces are strong, conical, and
vertical; the maxillae are short, convex at the base, round at the extremity, and slightly
inclined towards the lip, which is nearly quadrate, being rather broader at the base than at
the extremity; the sternum is heart-shaped. These parts are glossy, and, with the legs and
palpi, are of a dark-brown colour, the margins of thé cephalo-thorax and the base o f the
lip being much the darkest. Each tarsus is terminated by two curved, pectinated claws.
The lateral eyes arè the largest, and the intermediate ones o f the anterior row are the smallest
of the eight. The abdomen is soot-coloured, short, thickly covered with hairs, rather broader
at the posterior than at the anterior extremity, convex above, and projects a little over the
base of the cephalo-thorax; the colour of the spinners is brown; they are disposed in a
transverse row immediately below the 'anus, and the exterior ones, which are much longer
than the rest, and triarticulate, have the spinning-tubes distributed on the inferior surface of
the terminal jo in t; the sexual organs are prominent, and of a dark, reddish-brown h u e ; and
the branchial opercula have a pale-yellow tint.
The male is smaller than the female, but it does not differ from her in colour. The
cubital and radial joints of its palpi are short; the former, which is the larger, has a fine,
prominent process on the outer side, hear the upper part, which is curved upwards at its
extremity; and the latter is terminated, on the under side, by a pointed apophysis curved
outwards; the digital joint is oval, convex and hairy externally, concave within, comprising
the palpal organs; they are highly developed, not very complicated in structure, with a
pointed, corneous process, which originates near the middle of the outer side, and is curved
upwards; their colour is dark-brown. The convex sides of the digital joints are directed
outwards.
About midsummer, this species, which, notwithstanding its close connexion with the
Agelena, M. Walckenaer has placed in the genus Argus \see the synonyma), may be seen in
considerable numbers running on the ground, and on rails and gates, in pastures near
Llanrwst. The palpal organs o f the male are fully developed in May.
Agelena brunnea. PI. X, fig. 102.
Agelena brunnea, Blackw., Lond. and Edinb. Phil. Mag., third series, vol. iii, p. 351.
Blackw., Research, in Zool., p. 351.
Blackw., Annals and Mag. of Nat. Hist., second series, vol. viii,
p. 102.
Length o f the female, gd of an in ch ; length of the cephalo-thorax, jth, breadth, ^ th ;
breadth of the abdomen, ^ th ; length of a posterior leg, h ; length of a leg of the third
pair, ^ths.
The eyes are seated on black spots; those constituting the anterior row, which are