captured in Rio Janeiro. 423 



has a yellowish-white colour, with brown spots on the lateral 

 margins, opposite to the legs. The eyes are nearly equal in size, 

 and are disposed on and about the cephalic tubercles ; two are 

 situated in front below the tubercles, one in front of each tu- 

 bercle near its middle, one on the side, and another behind, at 

 the base of each ; the two seated on the side of the tubercles are 

 rather the smallest of the eight. The first and second pairs of 

 legs are much longer and more powerful than the third and 

 fourth pairs ; all are provided with numerous strong spines en« 

 larged at the base, those on the first and second pairs being 

 much the largest; the colour of the first and second pairs is 

 dark brown, tinged with red, with the exception of the tarsi and 

 the sides and under part of the base of the metatarsi, which 

 have a yellow-brown tint ; the third and fourth pairs are of a 

 brownish-yellow hue, with a few dark brown spots on the under 

 side ; each tarsus is terminated by two curved pectinated claws. 

 The palpi are short, and resemble the legs in colour. The abdo- 

 men is convex above, with whitish hairs and spines enlarged at 

 their base distributed over its surface ; the anterior part, con- 

 tiguous to the cephalothorax, has the appearance of having been 

 cat in a direct line across ; and in the middle region, which is 

 broader than the extremities, three long, conical, pointed pro- 

 cesses or tubercles are situated in a transverse row, the inter- 

 mediate one being the largest ; it is of a dark brown colour, with 

 a yellowish tinge in the medial line and at the base of the inter- 

 mediate tubercle, and the point of each tubercle has a yellowish- 

 white hue ; the colour of the anterior region of the sides and of 

 the under part is brownish-yellow ; the sexual organs have a 

 small process connected with their anterior margin which is 

 directed backwards, and are of a dark reddish-brown hue, that 

 of the branchial opercula and spinners being yellow-brown. 



The collection of Brazilian spiders made by Messrs. Gray and 

 Clark contained, besides this new and very interesting Eripus, 

 two specimens of the Eripus heterogaster of Walckenaer, both of 

 which were females. The males of E. spinipes and E. hetero- 

 g aster, the only species of the genus at present known, have not 

 yet been discovered. 



Genus Sparassus, Walck. 

 Sparassus sylvaticus. 



Length of the male ^rd of an inch ; length of the cephalo- 

 thorax ^ ; breadth j ; breadth of the abdomen J ; length of an 

 anterior leg 2% ; length of a leg of the third pair -J-^. 



The eyes are seated on black spots, and are disposed on the 

 anterior part of the cephalothorax in two transverse rows ; the 

 two intermediate ones of the anterior row, which is straight and 



