736 AUSTRALIAN AND TASMANIAN PSELAFHIDiE, 



directed forwards, the three appearing identical in this respect; 

 but from other directions each joint appears of different shape, 

 witli the sixth decidedly larger than tlie eighth, and not at all 

 pointed. From some directions the tip of the eleventh is seen 

 to be slightly bent inwards. The subbasal prothoracic impression 

 is produced backwards at its middle, so that; the base itself 

 appears to be in two lobes. 



Rybaxis aleatoria, n.S|». 



(J. Bright castaneous, tarsi paler; club infuscated except apical 

 joint, which is palest of all. With very short pale pubescence. 



Head rather longer than usual; with a deep, round, closed 

 fovea, of moderate size, close to each eye; and a smaller one 

 straight in front, and just behind insertion of antennfe. Antennse 

 with first joint fairly stout, second subglobular, fifth about twice 

 the length of fourth, and more than twice the lengtli of sixths 

 seventh slightly produced on one side, eighth smaller and more 

 strongly produced, ninth somewhat irregular on one side, tenth 

 considerably larger and trapeziform, eleventh almost as long as- 

 ninth and tenth combined. Prothorax about as long as wide, 

 .sides strongly rounded and widest at about two-fifths from apex; 

 with a fairly large, round fovea, on each side near base, and a 

 much smaller one in middle, the three without connecting impres- 

 sions. Elytra almost as long as wide; dorsal strito distinct to ■ 

 near apex; punctures indistinct, witli a narrow marginal stria, 

 but epipleiiral furrow absent. Upper surface of abdomen with . 

 a small niedio-basal node; lower surface with a transverse depres- 

 sion at apex of second segment. Metastermmi gently concave in 

 middle. Legs longer than usual; front and middle trochanters 

 obtusely dentate; front tibiae rather suddenly curved at apex. 

 Length 2 mm. 



Hab.— New South Wales: Sydney(A. M. Lea). 



The unique male was seen by M. Raffray some years ago, but 

 returned without comment. The tenth joint is slightly paler 

 than the three preceding ones, but is conspicuously darker than ■ 

 the eleventh. From the other species having the eleventh joint 



