undescribcd Genera and Species o/'Araneidae. 109 



smallest of the eight ; the posterior row is greatly curved, with 

 its convexity directed forwards ; it comprises the other four 

 eyes, which are large and separated by wide intervals, the 

 two intermediate ones being the largest of all. 



Maxillae powerful, curved towards the lip, enlarged and 

 rounded at the apices. 



Lip large and nearly quadrate. 



Legs moderately long, tapering to their extremities; the 

 fourth pair is the longest, the other three pairs being equal in 

 length. 



The spiders belonging to this genus are sedentary, con- 

 structing a horizontal web of a compact texture, with which a 

 tube is connected conducting to the spider's retreat, in the 

 crevices of rocks and walls, and in the intervals among stones. 



Textrix agilis. 

 Cephalothorax inversely heart-shaped, but elongated and 

 very prominent before ; the sides, which are glossy, slope ab- 

 ruptly, and are marked with deep furrows extending from 

 the carina to the margins, and a narrow longitudinal inden- 

 tation occupies the medial line of the posterior region ; its co- 

 lour is dark brownish-black, with a yellowish-white band of 

 short hairs extending along the carina, and numerous long 

 black hairs in front. Mandibles strong, conical, armed with 

 a few teeth on the inner side, and inclined towards the pec- 

 tus, which is heart-shaped. These parts, with the maxillje 

 and lip, are brownish-black ; the two latter organs being much 

 the palest, particularly at their extremities. The legs and 

 palpi are light brown, with brownish-black bands, and are fur- 

 nished with numerous erect, slender, black spines. There are 

 three claws at the extremity of each tarsus ; the two superior 

 ones are long, curved, and deeply pectinated, and the inferior 

 one is provided with a pair of small teeth on each side near the 

 base, where it is inflected ; beneath the claws are two strong 

 bristles thickly clad with minute hairs on the under side. 

 (In order to discern this structure a highly magnifying power 

 must be employed.) A slender, curved, pectinated claw ter- 

 minates each palpus. Abdomen oval, projecting a little over 

 the base of the cephalothorax ; it is thickly covered with hair, 

 and is black above with a broad, dentated band along the 

 middle, of a yellowish-white colour; the anterior part of the 

 band comprises four small black spots, two on each side of 

 the medial line, forming a parallelogram ; the sides of the ab- 

 domen are mottled with yellowish-white, and the under part 

 is reddish-brown, marked with a few minute yellowish-white 

 and black spots. The plates of the spiracles are yellowish- 



