Lycos A piscatoria. PI. II, fig. 17.
Lycosa piscatoria, Black w., Annals and Mag. of Nat. Hist., second series, vol. xx,
p. 498.
' ■L— (Potamia) piscatoria, Koch, Die Arachn., Band xv, p. 6, tab. 506, figs. 1417-
1419.
Length of the female, ^tlis of an inch; length of the cephalo-thorax, gth, breadth, ^ th ;
breadth of the abdomen, gth ; length of a posterior leg, fjjths; length of a leg of the third
pair, ^jths.
The intermediate eyes of the anterior row are larger than the lateral ones. The
cephalo-thorax is compressed before, depressed and rounded on the 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 maxillae, are of 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-brown 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 tin t; the colour of the sexual organs is
dark, reddish-brown, and that of the branchial opercula is yellow.
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 swampy piece of ground in
Buckinghamshire.
Genus DOLOMEDES {Latrcille).
Eyes unequal in size ; four in front of the cephalo-thorax form a transverse row, the
other four, situated in front and on the sides of its anterior part, describe a trapezoid whose
posterior side is much the longest.
Maxilla straight, rather enlarged and rounded at the extremity.
Lip almost quadrate.
Leys long and robust ; the fourth pair is usually the longest, the second pair commonly
surpasses the first in length, and the third pair is the shortest.
Dolomedes mirabilis. PI. II, fig. 18.
Dolomedes mirabilis, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 356.
— — Latr., Gen. Crust, et Insect., tom. i, p. 117.
—^ — Hahn, Die Arachn., Band ii, p. 35, tab. 51, fig. 120.
— — Blackw., Annals and*Mag. of Nat. Hist., second series, vol. vii,
p. 398.
Ocyale — Sund., Yet. Acad. Handl., 1832, p. 198.
— Koch, Uebers. des Arachn. Syst., erstes Heft, p. 23.
— — Koch, Die Arachn., Band xiv, p. 107, tab. 482, fig. 1346.
rufofasciata, Koch, Die Arachn., Band xiv, p. 110, tab. 482, fig. 1347.
— murina, Koch, Uebers. des Arachn. Syst., erstes Heft, p. 23.
— — Koch, Die Arachn., Band xiv, p. I l l , tab. 483, fig. 1348.
Titulus 28, Lister, Hist. Animal. Angl. De Aran., p. 82, tab. 1, fig. 28.
Length of the female, l an in ch ; length of the cephalo-thorax, |th, breadth, Jth; breadth
of the abdomen, p i ; length of a posterior leg, §ths; length of a leg of the third pair, s§ths.
The cephalo-thorax is short, compressed before, depressed and rounded on the sides,
triangular in front, with a narrow indentation in the medial line of the posterior region; it is
thickly covered with hairs of a yellowish-brown colour, which are palest oil the sides, and has
a narrow, yellowish-white line extending along the middle; the frontal triangular space is
sparingly provided with hairs, and of a reddish-brown colour, its sides having a yellowish-white
tint. The intermediate eyes of the anterior row are the smallest, and those constituting the
anterior pair of the trapezoid are the largest of the eight. The falces are powerful, conical,
armed with two rows of teeth on the inner surface, and of a red-brown hue. The maxillae