walckenaera. 
307 
the four intermediate ones describe a trapezoid, the two anterior ones, which are the smallest 
of the eight, forming its shortest side ; the eyes of each lateral pair are seated obliquely on a 
tubercle, and are contiguous. The cephalo-thorax is oval, convex, glossy, with slight furrows 
on the sides converging towards an indentation in the medial line; the lip is semicircular and 
prominent at the apex; and the sternum is broad, heart-shaped, convex, and glossy. These 
parts are of a very dark-brown colour, tinged with red, the lateral margins of the cephalo- 
thorax being the darkest. The falces are conical, inclined towards the sternum, and armed 
with teeth on the inner surface; and the maxillae are enlarged where the palpi are inserted, 
and inclined towards the lip. These organs have a brown-red hue. The legs and palpi are 
provided with hairs, and are of a yellowish-red colour ; the fourth pair of legs 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 slender, and the inferior one is inflected near its base. 
The abdomen is oviform, glossy, convex above, and projects over the base of the cephalo- 
thorax ; it is thinly clothed with short hairs, and has a black hue; the sexual organs are 
minute, and of a reddish-brown colour, that of the branchial opercula being pale-yellow. 
The sexes are similar in colour, but the male, which is rather the smaller, has the 
anterior part of the cephalo-thorax more elevated, and has a narrow indentation directed 
backwards from each lateral pair of eyes. Its palpi are short, and the radial and digital 
joints have a dark-brown hue ; the humeral joint is curved towards the cephalo-thorax, and 
the radial, which is stronger than the cubital joint, has a small, curved, pointed apophysis at 
its extremity, in front, towards the inner side ; the digital joint is oval, convex and hairy 
externally, concave within, comprising the palpal organs, which are highly developed, com¬ 
plicated in structure, with a black, filiform spine at their extremity, on the outer side ; this 
spine is curved in a circular form, and within the curvature there is a prominent, pointed, 
slightly curved spine, at the base of which there is some whitish membrane; the colour of 
these organs is dark-brown, faintly tinged with red. 
Females of this species, in a state of complete development, have been found on several 
occasions among herbage growing in meadows and old pastures near Hendre House; and in 
May, 1860, the Rev. O. P. Cambridge took adult individuals of both sexes on the banks of 
the Conwav. 
j 
Walckenaera humilis. PL XXI, fig. 223. 
Walckenaera humilis, Blackw., Linn. Trans., v.ol. xviii, p. 636. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, 
p. 465. 
Argus — Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 506. 
Length of the female, T ' 5 th of an inch; length of the cephalo-thorax, ^th, breadth, ^nd; 
breadth of the abdomen, j 5 th; length of an anterior leg, p,th; length of a leg of the third 
pair, Jjth. 
The cephalo-thorax is oval, glossy, convex behind the eyes, depressed in the posterior 
