median pair, their diameter apart are one and a half times the diameter of the 

 laterals, from which they are distant the diameter of the latter. The second 

 row pair are twice the diameter of the front median, one and a half diameters 

 apart, they are twice their diameter from the rear pair, which are slightly 

 smaller and four times their own diameter apart. The Clypeus is rather wider, 

 than the front median eyes. The Mandibles are longer than the breadth of the 

 front margin of the Cephalothorax, kneed at the base and thickly covered 

 on that portion with long upstanding thick bristly hair, the lower part is 

 narrower and nearly smooth. On the inner margin of the falx sheath are 

 two teeth. 



The Lip is nearly twice as broad as long, hollowed in front and with a 

 rather wide sloping front margin. The Maxillae are upright, broad, rather 

 square at the top, and the palpal trochanters rather remarkably long. The 

 Sternum is broadly ovate, straight in front and pointed at the rear. It is 

 thinly clothed with flat plumose bristles. 



The A hdomen is ovate, truncate in front, the Spinnerets remarkably short, 

 conical, and flat at the anterior end. 



The Legs and Palpi are fine and only moderately long. The distal end of 

 the tarsal joint has a sloping troncature, the superior claws being long and 

 only slightly curved, the outer one has two or three short pectinations right at 

 the base ; a slight compression of the sides, and a ring of bristles therefrom, 

 conveys the impression of an onychium, which, however, seems to me to be 

 false. Several not quite adult males are of the same colouration as the 

 females. 



The measurement in millimetres are as follows : — 



Legs 



Palpi 



These specimens came from Yii-lin Fu, N. Shensi, on the border of the 

 Ordos desert. 



216 



