140 
CINIFLONIDiE. 
ClNIFLO ATROX. PI. IX, fig. 88. 
Ciniflo atrox, Blackw., Linn. Trans., vol. xviii, p. 607. 
_ — Blackw., Annals and Mag. of Nat. Hist., second series, vol. viii, p. 98. 
Clubiona atrox, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 605. 
— — Latr., Gen. Crust, et Insect., tom. i, p. 93. 
— — Sund., Yet. Acad. Handl., 1831, p. 144. 
— — Hahn, Die Arachn., Band i, p. 115, tab. 30, fig. 87. 
Amaurobius atrox, Koch, Uebers. des Arachn. Syst., erstes Heft, p. 15. 
— — Koch, Die Arachn., Band x, p. 116, tab. 355, fig. 831. 
Titulus 21, Lister, Hist. Animal. Angl., De Aran., p. 68, tab. i, fig. 21. 
Length of the female, |ths of an inch; length of the cephalo-thorax, ;'th, breadth, #h; 
breadth of the abdomen, Jth; length of an anterior leg, T 7 B ths; length of a leg of the third 
pair, Jrd. 
The cephalo-thorax is rounded on the sides, compressed before, convex, glossy, thinly 
clothed with hairs, depressed and broadly truncated in front, and marked with furrows on the 
sides, which converge towards the middle; its colour is reddish-brown, the anterior part, 
which is much the darkest, in some specimens approaching to black. The falces are powerful, 
conical, vertical, gibbous in front, near the base, armed with a few teeth on the inner surface, 
and of a brownish-black colour. The sternum is somewhat oval, but pointed at its posterior 
extremity; this part, with the maxillae and lip, is of a reddish-brown hue, the lip being the 
darkest, and the sternum the palest. The legs are robust, provided with hairs and strong 
spines, of a pale, reddish-brown tint, the tarsi being the darkest, and are marked with soot- 
coloured annuli; the inferior tarsal claw has a fine, curved tooth on each side, near its base. 
The palpi resemble the legs in colour, but are without annuli; they have a curved, pectinated 
claw at their extremity. The abdomen is oviform, rather broader at the posterior than at the 
anterior extremity, convex above, hairy, projecting over the base of the cephalo-thorax; it is 
of a dark-brown colour, with a large, quadrilateral, black band, bordered laterally and 
posteriorly with pale-yellow, extending from the anterior extremity nearly to the middle of the 
upper part; the posterior part of the black band is the broadest, and its margins, which 
present an irregular outline, are the darkest; between the black band and the spinners there 
is a series of rather obscure, yellowish, angular lines, whose vertices are directed forwards, 
and the sides and under part are thickly spotted and streaked with black; the spinners have 
a dull-yellow T ish tint; a broad, glossy, dark, red-brown septum separates the orifices of the 
sexual organs, and the colour of the branchial opercula is pale-yellow. 
The male is smaller than the female, the anterior part of its cephalo-thorax is lighter 
coloured, and its legs, which are longer and slenderer, differ also in their relative length, the 
second pair equaling or even slightly surpassing the fourth pair in longitudinal extent. The 
cubital and radial joints of the palpi are short, the latter, which is the larger, being provided 
