46 
SALTICIDiE. 
Eresus cinnabarinus. PL III, fig. 23. 
Eresus cinnabarinus, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 395. 
_ _ Latr., Gen. Crust, et Insect., tom. i, p. 121. 
_ — Koch, Die Arachn., Band iv, p. 106, tab. 138, fig. 318. 
_ _ Blackw., Annals and Mag. of Nat. Hist., second series, vol. vii, 
p. 400. 
— quadriguttatus, Hahn, Die Arachn., Band i, p. 45, tab. 12, fig. 35. 
_ — Koch, Die Arachn., Band iv, p. 104, tab. 138, fig. 316. 
_ — Koch, Uehers. des Arachn. Syst., erstes Heft, p. 35. 
— annulatus, Hahn, Die Arachn., Band i, p. 47, tab. 12, fig. 36. 
— — Koch, Die Arachn., Band xiii, p. 14, tab. 435, fig. 1087. 
— illustris, Koch, Die Arachn., Band iv, p. 105, tab. 138, fig. 317. 
Length of the female, jrd of an inch. 
The posterior eyes of the four constituting the small trapezoid included in the quadri¬ 
lateral figure described by the other four are the largest of the eight. The cephalo-thorax is 
large, rounded on the sides, and convex before; it is black, with a red band on the posterior 
part of each lateral margin, which tapers to its anterior extremity. The falces are short, 
powerful, conical, and vertical; these organs, with the maxillae, lip, and sternum, are black. 
The legs are robust, hairy, and black, with white annuli at the articulation of the joints, the 
thighs of the second, third, and fourth pairs being commonly clothed with red hairs; the 
fourth pair is the longest, then the first, and the third pair is the shortest. The palpi are 
short, strong, hairy, and black, having, like the legs, white annuli at the articulation of the 
joints. The abdomen is oviform, depressed, densely covered with short hairs, and projects 
over the base of the cephalo-thorax ; on the upper part, which is of a bright-red colour, there 
are four conspicuous black spots, encircled with white hairs, forming a square ; and in some 
instances an additional pair of small spots of the same hue occurs in the space between the 
square and the spinners; the under part is black, with the exception of a white spot near its 
posterior extremity, and the branchial opercula, which are covered with red hairs. 
The male may be distinguished from the female by its smaller size, and by the structure 
of its palpi; the digital joint is oval, convex, and hairy externally, concave within, comprising 
the palpal organs, which are moderately developed, prominent, conical, and somewhat 
pointed. 
The colour of the legs and the number of black spots on the upper part of the abdomen 
are not constant in this species, which is admitted as British on the authority of Dr. Leach. 
See the Supplement to the fourth, fifth, and sixth editions of the ‘ Encyclopaedia Britannica, 
article Annulosa. 
