36 Kev. C). r, Cambridge on some new 



convex, its surface corneous, minutely punctured, and marked 

 Avith a marginal row of large round and oval boss-like spots 

 of different sizes, and impressed in the usual way in their 

 centres ; four other similar markings describe nearly a square 

 in the middle, with a much smaller one on each side of its 

 fore part. The six middle anterior marginal markings, as 

 well as the fore halves of the two anterior central ones, are of 

 a bright orange colour on a paler ground ; the rest of the 

 upper surface of the abdomen is of a dull sooty hue, the boss- 

 like markings being of a deep blackish red-brown colour. 

 The underside of the abdomen is of a dull yellowish brown 

 hue, wrinkled and covered thickly with minute dark red- 

 brown tubercles, each of which is surmounted by. a short 

 bristle. 



A single example of this spider was received from Caj)e 

 York, and is (so far as I know) the first recorded species of 

 the genus yet known on the Australian continent. It is witli 

 great pleasure that I connect with it the name of Dr. Ludwig 

 Koch, the able author of ' Die Arachniden Australiens.' 



Fam. Arcydes, 



Gen. nov. Augusta. 



Generic characters. 



CepJialotJiorax broad and rather flattened, truncated before, 

 and rounded behind ; caput very distinctly divided from the 

 thorax, which it also exceeds in breadth ; it has a deep notch 

 or incision on each side near the fore extremity ; and its lateral 

 upper margins are sharp-edged. 



Eyes eight, in three widely separated groups ; a central one 

 of four, forming nearly a squai-e in the centre, is situated close 

 to the fore margin of the clypeus, and two others on each 

 fore corner, seated on the portion divided from the rest of the 

 caput by the incision before noticed. 



Legs short and tolerably strong; relative length 4, 1, 2, 3. 



Maxilke short, broad at their extremity, and bent strongly 

 downwards towards the sternum. 



Labium broad and short, of a somewhat semicircular form, 

 pointed at the apex. 



Abdomen covered with a large and nearly flat scutum, of a 

 subtriangular form, the base of the triangle being in front ; its 

 upper and under sides are completely occupied with shining 

 patches, varying in size, but nearly all of a pentagonal form, 

 the dividing portions or ribs being almost all of a uniform 

 width, and furnished with very minute, corneous, shining and 



