WALCKENAERA. 
315 
prominence of the cephalo-thorax; two are seated transversely on the summit of the superior 
lobe, and the other six on the summit of the inferior lobe, high above the frontal margin ; the 
four intermediate eyes form a long, narrow trapezoid whose anterior side is the shortest, and 
those of each lateral pair are placed obliquely on a minute tubercle. The legs are slender, 
provided with hairs, and of a yellowish-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 pectinated, and the inferior one is inflected near its base. The palpi 
resemble the legs in colour, with the exception of the digital joint, which has a brown hue; 
the radial is shorter than the cubital joint, and is produced and pointed at its extremity, in 
front; the digital joint is oval, convex and hairy externally, coucave within, comprising the 
palpal organs, which are highly developed, prominent, complex in structure, and of a dark- 
brown colour. The abdomen is oviform, sparingly clothed with hairs, glossy, convex above, 
projecting over the base of the cephalo-thorax, and has a brown-black hue. 
The trivial name “ acuminata having been given to the typical species of the genus 
Walckenaera, the specific name conferred upon this spider by M. Wider has been changed to 
fastigata. The specimen from which the description was made was found among moss, at 
Southport, in June, 1859, by the Rev. 0. P. Cambridge, and possesses the essential characters 
of a Walckenaera in a high state of development. 
Walckenaera nemoralis. PI. XXII, fig. 230. 
Walckenaera nemoralis, Blackw., Linn. Trans., vol. xviii, p. 641. 
— ,— Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix, 
p. 466. 
Argus nemoralis, Walck., Hist. Nat. des Insect. Apt., tom. iv. p. 507. 
Length of the male, ^th of an inch; length of the cephalo-thorax, And, breadth, Ath; 
breadth of the abdomen, And ; length of a posterior leg, Ath ; length of a leg of the third 
pair, T ith. 
The legs are robust and provided with hairs ; the fourth pair is the longest, then the 
first, and the third pair is the shortest; the two superior tarsal claws are curved and pecti¬ 
nated, and the inferior one is inflected near its base; the cephalo-thorax has no indentation 
in the medial line; the anterior part is prominent but obtuse, with a transverse groove in 
front, which divides it into two segments; one pair of eyes is seated on the upper segment, 
near its anterior margin, and the rest are distributed on the lower segment, one pair being 
placed on each side, and the other in front; the eyes of the last pair are the smallest of the 
eight, and, with those on the upper segment, form a long trapezoid, whose shortest side is 
before; the falces are moderately strong, conical, armed with teeth on the inner surface, and 
inclined towards the sternum, which is broad, convex, and heart-shaped. These parts, with 
the maxillae, lip, and palpi, are of a brown colour, the legs being the palest, and the lip, 
anterior part of the cephalo-thorax, and digital joint of the palpi the darkest. The radial 
41* 
