Genera and Species of Araneidea. 27 



Atrax rohustus, sp. n. (PI. VI. fig. 1.) 



Adult female, length 13 lines, to end of falces 16 lines. 



The whole of the fore part of this spider is of a deep rich 

 red-brown colour; the cej)hahtJiorax smooth, shining, and 

 destitute of hairs ; the colour, however, of the falces is rather 

 darker, and the fang is long and strong. 



The legs do not differ greatly in length ; and their armature 

 consists of hairs, slender bristles, and a few spines. 



The labium^ which is convex in front, is studded with small 

 tooth-like spines, a large portion at the base of the maxillae 

 being also similarly furnished. 



The ahdomen (in the only specimen examined, a dried one) 

 was much shrunken ; it is hairy, and its colour is a dark red- 

 dish brown. The spinners, four in number (?), were broken off. 



A single example of this spider, from New Holland, is in 

 the British-Museum collection. 



Gen. nov. Idiophthalma. 



Generic characters. 



Cephalothorax oblong-oval ; fore part and hinder part about 

 equal in width ; rather flattened, but the occipital portion 

 somewhat roundly convex. 



Eyes in three transverse rows, very similar to Idiops &c., 

 but differing in the greater length of the front row and the con- 

 tiguity of the outer eye, at each end of the hinder row, to the 

 one next to it, forming two pairs considerably removed from 

 each other. The hinder row is the longest, consisting thus of 

 four eyes, and the middle row the shortest. 



Falces strong and bristly, furnished with a group of strong 

 spines on the upperside of their fore extremity. 



Legs moderate in lengthy strong, furnished with hairs and 

 bristles only, the metatarsi and tarsi with a compact scopula. 

 The legs of the fourth pair were wanting ; the relative length 

 of the rest is 1, 2, 3. 



Maxillce long, cylindrical, and slightly curved. 



Labium oblong, slightly broader at the apex (which is 

 truncated) than at the base. 



Idiojjilithalma suspecta^ sp. n. (PI. VI. fig. 2.) 



Adult female, length 6| lines, including falces 8|. 



The colour of the cephalothorax, legs, and palpi is dark 

 reddish brown, the falces being of a deeper brown than the 

 cephalothorax ; abdomen brown. 



