370 
DYSDERIDiE. 
Dysdera erythrina. PI. XXYIII, fig. 266. 
Dysdera erythrina, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 361. 
— — Latr., Gen. Crust, et Insect., tom. i, p. 90. 
•— Halm, Die Araclin., Band i, p. 7, tab. 1, fig. 3. 
— — Koch, Uebers. des Araclin. Syst., erstes Heft, p. 20. 
— — Koch, Die Arachn., Band v, p. 76, tab. 165, fig. 389. 
— — Blackw., Linn. Trans., vol. xix, p. 128. 
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. x, 
p. 250. 
Length of the female, ,:|,ths of an inch; length of the cephalo-thorax, 1th, breadth, ^ths ; 
breadth of the abdomen, 5 3 c ths; length of an anterior leg, i'ths; length of a leg of the third 
pair, §ths. 
The two anterior eyes are the largest of the six. The legs are provided with short hairs, 
and have a red hue ; the first pair is the longest, then the fourth, and the third pair is the 
shortest; each tarsus is terminated by two curved, pectinated claws, below which there is a 
scopula. The palpi resemble the legs in colour, and have a small, curved claw at their 
extremity. The cephalo-thorax is large, oval, convex, glossy, with a narrow indentation in 
the medial line ; the falces are powerful, conical, prominent, and densely fringed with hairs 
on the inner surface; the maxillae are pointed at the extremity, the inner surface of which is 
supplied with long hairs; the apex of the lip is hollowed; and the sternum is oval, thinly 
clothed with hairs, and has small eminences on the sides, opposite to the legs. These parts 
are of a deep-red colour. The abdomen is oviform, convex above, and projects a little over the 
base of the cephalo-thorax; it is sparingly clothed with short hairs, and of a yellowish-brown 
colour, in some instances tinged with red. 
The male is rather smaller than the female, which it resembles in colour. The digital 
joint of its palpi is slightly dilated, and the palpal organs, connected with it by a short 
pedicle near the middle of the under side, project from it at right angles ; they are pyriform, 
tapering to a fine, elongated, curved point, and are of a red colour. 
Specimens of Dysdera erythrina have been taken under stones in the central parts of the 
city of Manchester; others have been captured in Cambridge, by Professor Potter and 
Mr. Alfred Bishop, and in Oxford by Mr. W. H. Baxter; Mr. F. Walker also has met with 
this spider on the south coast near the seashore, and Mr. R. Templeton has recorded two 
instances of its occurrence in Ireland. 
