Mr. BrackwaLL's Descriptions of new Species Spiders. 619 
joint; each inferior tarsal claw is provided with two pairs of fine teeth near 
the base; and the web constructed by this species is of a compact texture, 
having a tube connected with it, extending, usually, to the extremity of a 
cylindrical cavity in the earth, which is frequently excavated by the animal 
itself. 
The distinctness of the genus Cavator will be immediately perceived on 
comparing the characters upon which it is founded with those of the other 
genera comprised in the family Agelenide. 
^ 
Genus AGELENA, Walck. 
8. Agelena om Cephalo-thorace mandibulis maxillis palpis labio sterno 
pedibusque flavescenti-rufis, horum pari 4to longissimo, reliquis æquali- 
bus; oculis seriei anterioris intermediis omnium maximis; abdomine 
digticante; serie medianá linearum obscurarum angularium pallidiorum 
maculaque utrinque antice ovali nigra. 
Length of the female, not including the spinners, 4th of an inch; length of 
cephalo-thorax ; breadth %; breadth of abdomen 4; length of a 
posterior leg $; length of a leg of the third pair 4. 
Anterior part of the cephalo-thorax compressed; sides depressed, marked 
with furrows diverging from the upper part to the margins; a row of 
bristles, directed forwards, extends along the medial line, and there is 
an indentation in the posterior region. Mandibles strong, conical, armed 
with a few very minute teeth on the inner surface, and inclined towards 
the sternum, which is broad and heart-shaped. Maxillæ short, gibbous 
at the base, and inclined towards the lip, which is nearly quadrate, being 
rather broader at the base than the extremity. Fourth pair of legs the 
longest, the other pairs equal in length. "These parts and the palpi are 
glossy, and of a yellowish red colour, the base of the lip being the darkest. 
Each tarsus is terminated by three claws; the two superior ones are 
curved and pectinated, and the inferior one is inflected near its base. 
The palpi have a curved claw at their extremity. Eyes disposed on the 
anterior part of the cephalo-thorax, in two transverse, curved, nearly 
parallel rows, whose convexity is directed backwards; the intermediate 
Vol. XVIII. 4M 
