522 



A female from Ooldea may belong to the species, but its 

 elytral punctures are very much smaller and nowhere con- 

 fluent, and the rami of the club are somewhat shorter than 

 on other females; it is also somewhat smaller (a still smaller 

 specimen from Lennonville with normal punctures is before 

 me, however), but otherwise agrees so well with co-type 

 females that it appears better to regard it as a probable 

 variety, than as a distinct species (till at any rate a male is 

 available for comparison). 



O. spinicollis, Blackb., Ooldea (pi. xxxvii., fig. 113). 



OCNODUS UNIDENTATUS, 11. sp. 



PL xxxvii., fig. 152. 



Very dark reddish-brown, darker on upper-surface than 

 under; antennae paler. Upper-surface glabrous, except for 

 a few setae in lateral gutters. 



Head with fairly numerous, sharply defined punctures 

 between eyes, but a polished impunctate space in middle of 

 base ; clypeus with somewhat larger and more crowded punc- 

 tures, sides evenly rounded but middle of apex truncate ; 

 labrum not projecting beyond clypeus, and rather distant 

 from its summit; mentum depressed along middle, and with 

 sharply defined punctures. Prothgrax evenly convex, sides 

 rounded in middle, oblique to apex, subarcuate to base ; 

 punctures much as on head between eyes. Elytra with sutural 

 interstice on each well-defined, slightly dilated near base, but 

 elsewhere evenly convex and with two regular rows of 

 punctures, striation elsewhere (except marginal) feebly defined 

 or absent ; punctures rather larger and more crowded than 

 on prothorax. Pygidium with crowded and irregular punc- 

 tures, and with a median carina. Front tibiae strongly 

 produced at apex, and without teeth behind same. Length, 

 8 mm. 



Hab. — Queensland: Coen River (W. D. Dodd). Type 

 (unique), I. 4821. 



A highly polished species, appearing black to the naked 

 eye, the cephalic punctures are very sharply defined. The 

 basal angles of the prothorax, as seen from above, appear to 

 be quite sharply j^ointed, but when viewed at right angles are 

 seen to be right angles slightly rounded off. It is the only 

 known species with unidentate front tibiae. 



Two specimens from the Northern Territory (Daly River 

 and Darwin, H. Wesselman) and one from North-western 

 Australia (Roebourne, J. P. Tepper) appear to belong to 

 this species, but differ in having the punctures on the head 

 decidedly smaller and denser (especially those behind the 



