1883.] REV. O. p. CAMBRIDGE ON NEW SPIDERS. 365 



_ Palpi leg-like in the female, armed as the legs and ending with a 

 smgle curved claw. 



Fakes strong, prominent and massive, considerably gibbous at the 

 base on the upperside, the gibbosity greatly prolonged forwards in 

 a curved form in the male. 



MaccillcB short, broad, convex in front and prominent in an obtusely 

 corneal form at the base, with only a slight subcouical prominence 

 at the extremity on the inner side. 



Labium short, somewhat subtriangular, its apex rounded, and its 

 base inserted into a deep rounded indentation of the sternum, which 

 is oval, with a round impressed spot on the margin opposite to the 

 insertion of the basal joints of the first three pairs of leo-s. 



Abdomen short, oval ; very convex above, with a bare, subtrian- 

 gular, or somewhat kidney-shaped patch on the upperside near the 

 fore extremity. Spinners 6 ; an inferior transverse row of four of 

 which the outer ones are very small ; the superior pair loner, upturned 

 and three-jointed. ^ ' 



Atypoides riversii, sp. n. (Plate XXXVI. fig. 2.) 

 Adult male, length 6 lines. 



Cephalothorax greenish brown ; caput dark and of a reddish- 

 brown tinge, marked on its surface with minute punctures. 



Legs similar in colour to the th(;rax, those of the two foremost 

 pairs being darkest ; the terminal tarsal claws are three, the superior 

 pair long and pectinated, the inferior claw small. 



Falces darker than the caput ; they have an extraordinary appear- 

 ance from the two long, projecting, curved apophyses at their base • 

 these are cyhndrical, obtusely pointed, and dense'ly clothed at and 

 near their extremity, above and on the sides, with long coarse bristly 

 black hairs ; the extremity of the falces in this sex ( J ) have no 

 spines on the upperside. 



Maxilla; similar in colour to the caput. 

 _ Palpi long, strong, similar to the fore legs in colour ; the radial 

 joint is double the length of the cubital, of an elongate-oval or tumid 

 form, clothed underneath with strong hairs; digital joint short 

 broadest and truncate at its fore extremity, where it is also clothed 

 with long bristly black hairs. The palpal orgaus are small, of a 

 rather irregular pynform shape, whose stem (directed backwards 

 close by the side, rather underneath the fore part of the radial 

 joint) is formed by a terminal sharpisii-poiuted spine. 



The abdomen is of a dull purplish-brown hue, very like that of 

 the European Aii/2Ms piceus, Sulz., freckled with small brownish- 

 yellow points, and a transverse kidney-shaped bare yellow-brown 

 patch at the fore extremity of the upperside. The general surface 

 of the abdomen is thinly covered with fine hairs. The spinners are 

 brown ; the two terminal joints of the superior pair paler. 



The/mf//e resembles the male in colour, but the hinder slope of 

 the caput is more abrupt, and the fore extremity more obtuse. 

 _ Instead of the long projections of the falces, there is on each a 

 simple strong subconical prominence directed a little backwards. 



