36 
LYCOSIDiE. 
Lycos a piscatoria. PI. II, fig. 17. 
Lycosa piscatoria, Blackw., Annals and Mag. of Nat. Hist., second series, vol. xx, 
p. 498. 
— ( Potamia ) piscatoria, Koch, Die Arachn., Band xv, p. 6, tab. 506, figs. 1417- 
1419. 
Length of the female, ^ths of an inch; length of the cephalo-thorax, |th, breadth, ~th ; 
breadth of the abdomen, ith; length of a posterior leg, T lths; length of a leg of the third 
pair, 5 \ths. 
The intermediate eyes of the anterior row are larger than the lateral ones. The 
cephalo-thorax is compressed before, depressed and rounded on tbe sides, glossy, somewhat 
hairy, with slight furrows converging from the lateral margins towards a narrow indentation 
in the medial line; it is of a yellowish-brown colour, with a broad, irregular, olive-brown 
band extending along each side, and a small bifid one in the middle, whose angular point 
terminates at the narrow medial indentation. The falces are powerful, conical, vertical, 
armed with a few teeth on the inner surface, and, with the maxillse, are 6f a reddish-brown 
hue, the latter being the paler. The colour of the lip is dark-brown in the middle, and 
reddish-brown at the sides and extremity. The sternum is heart-shaped, and of a dark- 
brown hue, with a longitudinal, yellowish-brown line in the middle. The legs are provided 
with hairs and sessile spines, and are of a yellowish-browm colour, with dark-brown annuli. 
The palpi resemble the legs in colour, but are without annuli. The abdomen is oviform, 
hairy, convex above, and projects over the base of the cephalo-thorax; the upper part is of a 
dark-brown hue, with a dentated, red-brown band extending along the middle, which 
diminishes in breadth as it approaches the spinners; a row of minute white spots, the 
posterior one being rather the largest, occurs on each side of this band, and its anterior part 
comprises an oval, red-brown mark bordered with black; there are a few ? yellowish-gray hairs 
on the sides, and the under part has a yellow-brown tint; the colour of the sexual organs is 
dark, reddish-browm, and that of the branchial opercula is yellow r . 
In their colours and in the design formed by their distribution the sexes are similar, but 
the male is the smaller. The radial joint of its palpi is rather longer than the cubital, and 
the digital joint, which has a dark-brown hue, tinged with red, is oval, convex, and hairy 
externally, concave within, comprising the palpal organs; these organs are highly developed, 
complicated in structure, with a curved, pale-red process at their extremity, and of a dark, 
reddish-brown colour. 
Mr. R. H. Meade took adult males and females of this species, which is closely allied 
to Lycosa piratica, in the last week of June, 1856, in a sw^ampy piece of ground in 
Buckinghamshire. 
