732 AUSTRALIAN AND TASMANIAN PSELAPHID^. 



belongs to this species. Schaufuss described the antennae as 

 " 10-articulatis, articulis 8-10 valde clavatis, uono latiore." The 

 Clarence River specimen, from above, certainly appears to have 

 but 10 joints, with the ninth widest; but from below the supposed 

 ninth joint is seen to be really the tenth, the true ninth being 

 small, and projecting to one side, but not sutRciently so to be 

 seen from above; the eighth is large and strongly transverse, 

 tenth largest and widest of all, sides rounded, one side of base 

 emarginate and produced, the other feebly emarginate and not 

 produced, eleventh briefly obpyriform. 



From above, the eighth appears larger than from below, the 

 true tenth appears lai-ger at one end than the other, but scarcely 

 emarginate; the others appear as from below. 



The specimen is a male, with the metasternum gently concave 

 and with a minute tubercle on each side of middle of apex; and 

 second segment of abdomen, on its under surface, with a flat 

 feeble medio-basal elevation, apj^earing semidouble from some 

 directions. 



Rybaxis parvidens, n.sp. 



J". Dark reddish-castaneous; legs slightly paler, elytra bright 

 castaneous, but suture darker, tenth joint of antennas piceous, the 

 eleventh palest of all. With short pale pubescence, more notice- 

 able on abdomen than elsewhere. 



Head with two lai'ge, closed, interocular fovete, and a fairly 

 large interautennal impression. Antennae with first joint fairly 

 large and subcylindrical, second subglobular, fifth distinctly longer 

 than fourth or sixth, seventh and eighth short and subtriangularly 

 produced on one side, ninth larger and very obtusely produced 

 on one side, tenth rather large and subtrapeziform, eleventh ovate, 

 not as long as the two preceding combined. Frothorax widest at 

 about apical third, sides strongly rounded, with a large fovea on 

 each side near base, with a deep curved impression connecting 

 them, the impression but slightly expanded in middle. Elytra 

 rather large; dorsal strise distinct, somewhat curved and vanishing 



