342 Mr. J. Blackwall on new Species of Araneidea 



eyes are disposed on the anterior part of the eephalotborax, high 

 above the frontal margin, in two transverse, nearly straight 

 rows ; the four intermediate ones almost form a square, the two 

 anterior ones, which are seated on a prominence, being rather 

 nearer to each other than the two posterior ones ; the lateral 

 eyes of both rows are the largest, and each is placed on a tubercle. 

 The eephalotborax is oval, somewhat convex, hairy, and has a 

 large indentation in the medial line of the posterior region j the 

 maxillse are short, obliquely truncated at the extremity, on the 

 outer side, and inclined towards the lip, which is broad and 

 semicircular; the sternum is heart-shaped; the legs are robust 

 and hairy ; the first pair is the longest, then the fourth, and the 

 third pair is the shortest ; 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 are moderately 

 long, and have a curved, pectinated claw at their extremity. 

 These parts are of a dark-brown colour, the extremity of the 

 maxillse having a yellowish-browu tint. The falces are conical, 

 vertical, and of a red-brown hue. 



An adult and an immature female of this Latrodectus were 

 comprised in the collection. 



Family Epeikid^. 



Genus Epeira, Walck. 



Epe'ira vigilans. 



Length of the female r^ths of an inch ; length of the eephalo- 

 tborax i, breadth' -i ; breadth of the abdomen f ; length of an 

 anterior leg -fg- ; length of a leg of the third pair -i^. 



The eephalotborax is convex, compressed before, rounded in 

 front and on the sides, with an indentation in the medial line of 

 the posterior region; it is thinly clothed with yellowish-grey 

 hairs, and is of a red-brown colour, the sides being much the 

 darkest. The falces are powerful, conical, vertical, and armed 

 with teeth on the inner surface ; the maxillse are short, straight, 

 and enlarged and rounded at the extremity ; and the lip is semi- 

 circular, but somewhat pointed at the apex. These parts are of 

 a pale red-brown colour, the extremity of the maxillse and the 

 apex of the lip having a pale-yellow hue. The sternum is heart- 

 shaped, with small eminences on the sides, opposite to the legs, 

 and is of a dull-yellow colour, tinged with brown on the lateral 

 margins. The eyes are disposed on the anterior part of the 

 eephalotborax in two transverse rows ; the four intermediate ones 

 are seated on a protuberance, and describe a trapezoid, the two 

 anterior ones, which are the largest of the eight, being wider 

 apart than the posterior ones ; the eyes of each lateral pair are 



