WALCKENAERA. 
297 
The cephalo-thorax is oval, convex, glossy, depressed at the base, prominent in the 
cephalic region, and marked with numerous minute punctures, forming rows which converge 
from the lateral margins towards the middle; the falces are small/conical, and vertical; the 
maxillae are strongly inclined towards the lip, which is semicircular and prominent at the apex ; 
and the sternum is broad, heart-shaped, convex, glossy, and marked with minute punctures, 
particularly on the sides. These parts are of a dark-brown colour, the falces and maxillae 
being the palest. The legs are provided with hairs, and have a yellow-red hue; the fourth 
pair is the longest, then the first, and the third pair is the shortest; each tarsus is terminated 
by three claws; the two superior ones are curved and slightly pectinated, and the inferior one 
is inflected near its base. The palpi are short, and somewhat paler than the legs. The eyes, 
which are nearly equal in size, are disposed on the anterior part of the cephalo-thorax, high 
above the frontal margin; the four intermediate ones form an elongated trapezoid, the two 
anterior ones, constituting its shortest side, being rather the smallest of the eight; and those 
of each lateral pair are seated obliquely on a small tubercle, and are almost in contact. The 
abdomen is oviform, somewhat pointed at the spinners, convex above, projecting over the base 
of the cephalo-thorax; it is thinly clothed with short hairs, marked with numerous minute 
punctures, and has four conspicuous, indented spots disposed in pairs on the upper part, of 
which the two posterior ones are the largest and widest apart; its colour is brown-black, and 
that of the branchial opercula is dark-brown. 
The sexes resemble each other in colour, but the male, which is the smaller, has the 
cephalic region much more prominent than the female; it has a narrow indentation directed 
backwards from each lateral pair of eyes, and is divided into two lobes by a transverse furrow 
in front; the posterior intermediate eyes are seated transversely on the superior lobe, and the 
other six on the inferior lobe, a marked protuberance occurring between the anterior inter¬ 
mediate pair and the frontal margin. The palpi are of a brown colour; the cubital is larger 
than the radial joint, and the latter projects a long, straight, pointed apophysis from its 
extremity, in front, and a minute one on the outer side ; the digital joint is oval, convex and 
hairy externally, concave within, comprising the palpal organs, which are moderately deve¬ 
loped, rather prominent, complex in structure, with a curved, filiform spine, and some delicate 
membrane at their extremity, and are of a dark-brown colour. 
Adult individuals of both sexes of this species were taken in Portland, by the Rev. O. P. 
Cambridge, in the autumn of 1859. 
Walckenaera obscura. PI. XX, fig. 212. 
Walckenaera obscura , Blackw., Research, in Zool., p. 321. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix^ 
p. 274. 
Length of the male, „th of an inch; length of the cephalo-thorax, r' T th, breadth, 3 ! ,nd; 
breadth of the abdomen, ^th; length of an anterior leg, -nth; length of a leg of the third 
pair, t-th. 
