314 
LINYPHIIDiE. 
nent but obtuse, with a large indentation immediately behind each lateral pair of eyes; the 
falces are moderately strong, conical, armed with teeth on the inner surface, and inclined 
towards the sternum, which is broad and heart-shaped ; the maxillae are inclined towards the 
lip, which is semicircular and prominent at the apex. These parts are glossy, and have a 
brownish-black hue, the falces and maxillae being the palest. The legs are provided with 
hairs, and are of a red-brown colour; the fourth pair is rather the longest, then the first, and 
the third pair is the shortest; the two superior tarsal claws are curved and pectinated, and 
the inferior one is inflected near its base. The eyes are disposed on the frontal prominence 
of the cephalo-thorax ; one pair is seated on the anterior part of its summit, and another, 
situated lower down, in front, describes with the former a trapezoid whose inferior side is the 
shortest; the eyes of each lateral pair are contiguous, and the two lower ones of the trapezoid 
are the smallest of the eight. The palpi have a brown tint; the radial joint is much larger 
than the cubital, and its extremity, which is greatly produced, tapers to a point curved out¬ 
wards in front of the digital joint; the digital joint is oval, convex and hairy externally, 
concave within, comprising the palpal organs; they are highly developed, complicated in 
structure, with a short, curved, pointed, black spine at the extremity, and are of a reddish- 
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 brownish-black hue, that of the 
branchial opercula being brown. 
A specimen of WalcJcenaera picina, captured in the neighbourhood of Manchester, was 
received from Mr. T. Glover, in June, 1838 ; and in the following month another specimen 
was taken near Llanrwst. Both individuals were adult males. 
Walckenaera fastigata. PI. XXI|,fig. 229. 
Theridion acuminatum, Wider, Museum Senckenb., Band i, p. 232, taf. 15, fig. 11. 
Micryphantes acuminatus, Koch, Die Arachn., Band iv, p. 130, tab. 143, figs. 332, 333. 
Argus ■— Walclc., Hist. Nat. des Insect. Apt., tom. ii, p. 370. 
Length of the male, ~th of an inch; length of the cephalo-thorax, T ' a th, breadth, Ath; 
breadth of the abdomen, ~th; length of a posterior leg, ith; length of a leg of the third 
pair, ith. 
The cephalo-thorax is large, oval, convex, glossy, depressed at the base, with a broad, 
shallow indentation in the medial line; the anterior part, which is very prominent, has a 
large indentation on each side, and is divided into two lobes by a deep, transverse groove in 
front; the summit of the superior lobe is rounded, with a slight depression in the middle, and 
has some short hairs in front; the inferior lobe, which is much the larger, is very convex ,- 
the falces are small, conical, and vertical; the maxillae are powerful, and inclined towards the 
lip, which 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, the base of the cephalo- 
thorax being the palest. The eyes are nearly equal in size, and are disposed on the anterior 
