168 
AGELENIDiE. 
cocoons of white silk of a fine texture, measuring about T 3 5 ths of an inch in diameter, in each 
of which she deposits from fifty to sixty spherical eggs of a yellowish-white colour, not 
adherent among themselves ; these cocoons are attached to walls or other objects in the 
vicinity of her web, and have generally particles of plaster, whitewash, or mortar disposed on 
their exterior surface. 
In Scotland and Ireland this species is abundant. 
The following remarkable physiological facts in connexion with Tegenaria civilis have 
been ascertained by observation and experiment; namely, that both sexes change their 
integument nine times before they arrive at maturity, once in the cocoon, and eight times 
after quitting it; that a leg of a young individual, detached at the coxa six times consecu¬ 
tively, may be reproduced at each succeeding change of integument after the infliction of the 
injury; that the life of this species extends through a period of four years; that the sexual 
organs of the male are connected with the digital joint of the palpi; and that the female, 
after impregnation, is capable of producing nine sets of prolific eggs in succession without 
renewing her intercourse with the male, more than two years elapsing before all are deposited, 
and ten months nearly intervening sometimes between the deposition of two consecutive sets. 
Tegenaria silvicola. PI. XII, fig. 108. 
Tegenaria silvicola, Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 464. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. xx, 
p. 500. 
Hahnia — Koch, Die Arachn., Band xii, p. 158, tab. 432, figs. 1076, 1077. 
Length of the female, ^th of an inch; length of the cephalo-thorax, s ' B th, breadth, ^th; 
breadth of the abdomen, ^th; length of a posterior leg, ith; length of a leg of the third 
pair, jth. 
The legs are moderately long, provided with hairs and sessile spines, two parallel rows 
of the latter occurring on the inferior surface of the tibiae and metatarsi of the first and 
second pairs ; the fourth pair is the longest, then the first, and the third pair is the 
shortest; they have a yellowish-brown colour, with brownish-black spots on the inferior 
surface of the femora, and annuli of the same hue on the tibiae and metatarsi. The palpi are 
of a uniform yellowish-brown colour. The eyes are disposed on the anterior part of the 
cephalo-thorax in two slightly curved, parallel rows, whose convexity is directed backwards; 
the four intermediate ones describe a trapezoid, and the two anterior ones, which constitute 
its shortest side, are the smallest and darkest of the eight. The cephalo-thorax is convex, 
glossy, compressed before, and rounded on the sides, which are marked with furrows con¬ 
verging towards an indentation in the medial line; it is of a pale-brown colour, with narrow, 
dark-brown margins, and oblique lines of the same hue on the sides. The falces are conical, 
and inclined towards the sternum, which is heart-shaped; the maxillae are straight, and 
rounded at the extremity ; and the lip is short, and somewhat quadrate, being rather broader 
