318 Mr. J. Blackvvall on new Species of Araneidea 



minute spots on each side of its auterior part are of a yellow 

 colour. The legs are long, provided with hairs and spines, and 

 are of a dark-brown colour, the inferior surface of the coxse and 

 of the femora, especially at their base, being strongly tinged 

 with dull-yellow ; the first pair is the longest, then the second, 

 and the third pair is the shortest ; the tarsi are terminated by 

 claws of the usual number and structure. The palpi are of a 

 dull-yellow colour, the digital joint (which is supplied with spines 

 and terminated by a curved, pectinated claw) being tinged with 

 brown at its extremity. 



The collection contained four adult females of this species. 



Genus Eurysoma, Koch. 

 Eurysoma Thorntoni. 



Length of the female -i-f- ths of an inch ; length of the cephalo- 

 thorax -fy, breadth J-; breadth of the abdomen -^j length of a 

 posterior leg •£■ ; length of a leg of the third pair ^. 



The eyes are situated near the frontal margin of the cephalo- 

 thorax ; the four intermediate ones are seated on a protuberance 

 and form a square, the two anterior ones being the largest and 

 darkest-coloured of the eight ; the eyes of each lateral pair are 

 placed a little apart on a tubercle, and are distant from the four 

 intermediate ones. The cephalothorax is convex, glossy, de- 

 pressed towards the extremities, compressed before, broadly 

 truncated in front, rounded on the sides, which are marked with 

 furrows converging towards an indentation in the medial line of 

 the posterior region, and is of a yellow-red colour. The falces 

 are short, powerful, conical, armed with teeth on the inner sur- 

 face, inclined towards the sternum, and of a brown colour, faintly 

 tinged with red. The maxillae are straight, and enlarged and 

 rounded at the extremity; the lip is semicircular; and the ster- 

 num is heart-shaped, with eminences on the sides, opposite to 

 the legs. These parts are of a yellow colour, the maxillae and 

 lip having a tinge of brown. The legs are short, provided with 

 hairs, and are of a dark-brown colour, with the exception of the 

 coxse and about two- thirds of the femora from the base, which 

 have a yellow hue ; the fourth pair is the longest, then the first, 

 and the third pair is the shortest ; the tarsi are terminated by 

 claws of the usual number and structure. The palpi, which are 

 short, resemble the legs in colour, and have a curved, pectinated 

 claw at their extremity. The abdomen is nearly circular, rather 

 broader than long, without spines, glossy, moderately convex 

 above, and projects greatly over the base of the cephalothorax ; 

 the upper part is of a deep-black hue, marked with numerous 

 circular depressions, and with twenty-two bright-yellow spots, 



