1890.] NEW ARANEIDEA. 625 



with two small teeth near the middle on its inner side. The legs are 

 furnished with slender bristles and hairs only, many of which had 

 probably been rubbed off, no spines being visible. 



Palpi slender, and similar to the legs in armature. 



Maxillce long, moderately strong, and of very characteristic form, 

 rather inclined towards the labium, enlarged near the extremities, 

 where they are obliquely truncated from the outer side inwards, the 

 truncation thickly clothed with hairs ; the palpi arising from about 

 halfway towards the extremity. 



Labium slightly more than half the length of the maxillae, sides 

 parallel, rounded at the apex. 



Sternum oval, rather broadest behind. 



Abdomen oblong, rather flattened above, somewhat truncated 

 before, and obtusely pointed behind. Spinners short, compact, 

 inferior pair rather longest and strongest, and placed immediately 

 beneath the hinder extremity of the abdomen. 



Platyoides abrahami, sp. n. (Plate LIII. fig. 4.) 



Adult female, length (not including the falces) very nearly 6 lines. 

 The colour of the cephalothorax and falces is a liver-coloured brown, 

 the normal grooves and indentations blackish. 



The legs have the tarsi, metatarsi, tibise, and genuse of a rather 

 olive-brown, the remainder dull orange-yellow. 



The palpi are olive-brown, as also are the maxillce and labium, 

 the last being darkest. 



The sternum is dull orange, with a narrow reddish-brown margin. 



The abdomen is thinly clothed with short hairs, and of an almost 

 uniform dull black above, paler along the middle of the upperside, 

 and with traces of transverse pale oblique lines just above the spinners, 

 but no distinct pattern visible, though this may have been owing to 

 the rather damaged condition of the type specimen ; the underside 

 is of a uniform pale dull yellow-brown. 



Hah. S. Africa. 



Genus Robsonia, Cambr. 

 Robsonia formidabilis, sp. n. (Plate LIII, fig. 5.) 



Adult male, length 4| to nearly 7 lines, to end of falces 7 to 9\ 

 lines ; length of female, including the falces, 9| lines. 



Cephalothorax, falces, labium, maxillce, and sternum rich liver- 

 colour. Legs and palpi yellow-brown, tinged with reddish. 

 Abdomen dull brown. 



The cephalothorax is slightly longer than the falces, of a broad- 

 oval form, truncated in front ; the lateral marginal constriction at the 

 caput is slight ; the caput and thorax are uniformly convex, with 

 very slightly marked normal indentations, and the surface is clothed, 

 but not densely, with rather short, light brownish fine hairs. 



The falces are long, slightly shorter than the cephalothorax, 

 powerful, projecting, and curved, with strong teeth on their inner 

 sides, where they are also furnished with numerous hairs. The fang 

 lies a little obliquely ; it is long and strong, and slightly curved. 



