24 
LYCOSIDiE. 
Lycosa lynx, Hahn, Die Arachn., Band ii, p. 13, tab. 42, fig. 104. 
— leucophaa, Blackw., Lond. and Edinb. Phil. Mag., third series, vol. x, p. 104. 
Arctosa cinerea, Koch, Die Arachn., Band xiv, p. 123, tab. 488, fig. 1358. 
Length of the female, |ths of an inch ; length of the cephalo-thorax, -^hs, breadth, igths; 
breadth of the abdomen, ^ths; length of a posterior leg, 1 inch; length of a leg of the third 
pair, ‘ths. 
This fine species has the lateral eyes of the four constituting the anterior row smaller 
than the intermediate ones. Its cephalo-thorax is large, thickly covered with hairs, and of a 
greenish-brown colour; the carina or most elevated part in the medial line is the darkest, 
and on each side of the eyes describing the quadrilateral figure there are two imperfectly 
defined, yellowish-white spots. The falces are powerful, conical, armed with teeth on the 
inner surface, supplied with grayish hairs in front, and densely fringed with pale-red ones 
near the extremity, on the inner side; these organs, with the maxillae and lip, are of a very 
dark-brown colour, the maxillae being paler at the extremity, which is fringed with light-red 
hairs on the inner side. The sternum is heart-shaped, of a dark-brown hue, and covered with 
hoary hairs. The legs are robust, abundantly provided with hairs and spines, and are of a 
yellowish-brown colour, with spots and annuli of a dark-brown hue. The palpi resemble the 
legs in colour. The abdomen is oviform, hairy, rather broader at the posterior than at the 
anterior extremity, convex above, projecting over the base of the cephalo-thorax; its colour is 
grayish-brown, faintly tinged with olive; a broad, obscure, dentated band, of a lighter hue, 
which terminates in three points, extends from the anterior part along the middle, nearly half 
of its length, and a series of pale, transverse, curved lines, somewhat enlarged at their 
extremities, and diminishing in length as they approach the spinners, occupies the space 
between the termination of the band and the extremity of the abdomen; the under part is of 
a yellow-brown colour. 
The male is smaller, lighter coloured, and more distinctly marked than the female. The 
radial joint of the palpi is rather longer than the cubital, and the digital joint is of an oblong 
oval form, convex above, hairy, and of a dull-brown hue; underneath, near its base, there is 
a small concavity comprising the palpal organs, which are neither highly developed nor com¬ 
plicated in structure, and are of a dark, red-brown colour. 
In the spring of 1836 this light-coloured variety of Lycosa allodrovia was discovered 
among water-worn stones and fragments of rock on the banks of the river Llugwy, near 
Capel Curig, Caernarvonshire, and was described in the ‘ London and Edinburgh Philosophical 
Magazine,’ under the appellation of Lycosa leucophcea. 
The genus Arctosa, proposed by M. Koch for the reception of this and several other 
species of Lycosce, like his genus Trochosa, is founded solely on specific characters. 
