523 



clypeal suture), those on the pronotum also smaller and 

 denser, but the labrum men turn and front tibiae are as on 

 the type. The two specimens from the Territory are also 

 somewhat paler. 



On this and all the following species the antennae are 

 nine- jointed, with the club three- jointed ; the prothorax on 

 all of them is from a little more than three to nearly four 

 times as wide as long (but the degrees are too close to be of 

 use in descriptions), its apex is lightly bisiiiuate, with a 

 feeble granule marking the junction of the sinuations. 



OCXODUS BIDENTATUS, 11. sp. 

 PL xxxvii., figs. 114 and 153. 



Black or blackish; legs not much paler, antennae and 

 palpi bright-castaneous. Upper-surface glabrous, except for 

 a few setae in the lateral gutters. 



Head rather large and convex, with densely crowded 

 punctures, less crowded about base than elsewhere; clypeus 

 strongly rounded; labrum not produced beyond clypeus, and 

 moderately distant from its summit; mentum not depressed 

 along middle, with an irregular row of punctures in front, 

 elsewhere without conspicuous punctures. Prothorax rather 

 strongly convex, sides rounded in middle, arcuate to base, 

 front angles produced but rounded off ; punctures sharply 

 defined and larger than on head but not so dense. Elytra 

 with large punctures in almost regular rows about suture and 

 sides, but not quite so regular elsewhere. Pygidium with 

 coarse, crowded punctures, and an irregular median carina. 

 Front tibiae strongly produced at apex and with a conspicuous 

 tooth at about one-third from apex. Length, 7^-8 mm. 



Hab.— South Australia: Murat Bay (Dr. C. T. Abbott), 

 Ooldea (A. O. Jones). Type, I. 4823. 



A small black coarsely sculptured species, apparently 

 allied to porosus, but with the front tibiae bidentate; only 

 two species have been previously named with similar tibiae, 

 and of these scissiceps (14) differs strikingly in many details 

 of the head and general sculpture ; suspiciosus is a narrower 

 species, with much smaller punctures and very different 

 clypeus and labrum. The tufts on the' tarsi, and the clypeal 

 suture are less conspicuous than usual. The hind angles of 

 the prothorax, as seen from above, appear to be acute and 

 rather small, with a notch before each, but from the side 

 each is seen to be more than a right angle. 



(14) The type is now in the British Museum, hut I examined 

 it prior to its being sent there. 



