ARGYROEPEIRA,.—TETRAGNATHA. 7 
The mawille are long, nearly squarely truncate at their extremities, divergent, and more than double the length 
of the labium, which with the maxille and sternum are somewhat suffused with brown. 
The legs, 1, 2, 4, 3, are not very long, but moderately strong, and furnished with a few slender spines. 
Hab. Costa Rica (Rogers). 
A single example, in bad condition, but quite recognizable. 
Argyroepeira lepida, sp. n. 
Adult female, length 5 lines; length of cephalothorax rather over 14 line, of abdomen 33 lines. 
The cephalothorax of this fine and distinct species is yellow, with a broad longitudinal central band, and a 
narrower marginal border of rich bistre brown; the central band continues quite through the ocular area, 
and meets the marginal border round the clypeus. 
The eyes are in three groups, unusually separated for this genus; the central group form a small quadrangle, 
whose longitudinal is greater than its transverse diameter. Those of each lateral pair are rather widely 
removed from the central group, and are contiguous to each other. 
The legs are long, 1, 2, 4, 3, moderately strong, yellow, broadly annulated with dark yellowish-brown, armed 
with spines, apparently rather stronger than usual, though most of them are broken off near their base. 
The metatarsi and tarsi of the first two pairs are furnished with two or more longitudinal rows of 
numerous strong, rather spur-like, divergent bristles. 
The falces are shorter than the cephalothorax, very strong and massive, rather divergent, porrected, convex in 
front ; the profile regularly curved, dark yellow-brown, softening into yellow in front and on the underside. 
Maville two thirds the length of the falces, divergent, and of the usual form, dark yellow-brown with reddish- 
yellow inner margin. 
Labium less than half, but more than one third, the length of the maxilla, oblong, rounded at its apex, dark 
yellowish-brown ; the apex paler. 
Sternum reddish yellow-brown, paler along the middle. 
Abdomen long, tolerably stout, subcylindric, the upper part of the posterior extremity projecting a little in a 
subcaudiform manner over the spinners. It is of a dull drab ground-colour, thinly spotted with minute 
silvery dots ; at each corner of the fore extremity is a slight subconical prominence, from the inner side ot 
each of which a jet-black rather irregularly angulated stripe runs backwards to the posterior extremity, 
the band enclosed by these stripes being rather darker than the rest of the ground-colour ; the sides are also 
broadly, but irregularly, marked with black ; and the underside has a longitudinal central yellow-brownish 
band margined with an indistinct darker line on which, near the middle (on each margin), is an elongate 
black patch or large spot; on each side of this central band is a stripe of a paler hue spotted with small 
silvery spots. The genital aperture is small, not very conspicuous, but characteristic. 
Hab. Panama, Bugaba (Champion). ‘Two examples. 
TETRAGNATHA, Latreille. 
Tetragnatha cognata, sp. n. 
Adult female, length 4 lines; adult male, slightly over 2 lines. 
This spider is nearly allied to the common European and British form 7’. evtensa (Linn.), which it resembies 
very closely in general appearance, size, colours, and markings, as well as in the position of the eyes; but 
it may be readily distinguished by the much shorter and proportionally stronger falces in both sexes, which 
are also differently armed in the male, and in the form of the palpi and palpal organs of the latter sex. 
Falces of the male less in length than the cephalothorax, rather strongly bent and divergent, a little gibbous 
on the outer side towards the fore extremity, parallel to which on the upperside a short, moderately strong, 
curved, obtusely pointed tooth is directed forwards. The fang is about three fourths the length of the 
falx, evenly curved, and lies along between two rows of denticulations, cf which the two terminal ones 
on the upperside forwards are much stronger than the rest ; near behind the point of the fang, as it lies at 
rest, is a blunt tubercular prominence. 
The palpi of the male are not very long; the cubital is slightly shorter than the radial joint, and is a little 
