524 



OCNODUS BILOBUS, 11. Sp. 



PI. xxxvii.j fig. 115. 



Dark castaneous-brown ; antennae and palpi paler. 

 Upper-surface glabrous, except for a few setae in the lateral 

 gutters. 



Head with crowded punctures, larger on than behind 

 clypeus ; clypeus conspicuously bilobed ; labrum deeply 

 notched, the sides projecting slightly in front of clypeus; 

 mentum strongly impressed along middle, with large and 

 dense punctures. Prothorax rather lightly convex, sides 

 gently rounded, oblique to apex, arcuate to base; punctures 

 about "as large as those between eyes, but sparser. Elytra with 

 subsutural and lateral striae well-defined, but the others 

 feeble or absent, punctures moderately large and dense. 

 Pygidium with rather crowded punctures, and a feeble median 

 carina. Front tibiae produced at apex into a rather strong 

 tooth, a somewhat obtuse tooth near apex, and a still more 

 obtuse one in middle. Length, 8-9 mm. 



Hah. — North-western Australia : Fortescue River (W. D. 

 Dodd). Type, I. 4820. 



In general appearance strikingly close to lugubris and 

 susjriciosus. There is a deep notch common to the clypeus 

 labrum and mentum, the labrum is not very prominent, but 

 its upper edge is close to the upper edge of the clypeus, so in 

 Blackburn's table (ante, 1907, p. 278) it would be associated 

 with porosus, from which it differs considerably in the 

 punctures and other features; in lugubris the labrum is 

 deeply notched, but not the clypeus, in suspiciosiis the front 

 tibiae are bi dentate. From above the hind angles of the 

 prothorax appear to be acute, but from the sides are seen to 

 be gently rounded off and rather larger than right angles ; 

 the elytra 1 stria ti on is but feebly defined, but such as it is it 

 appears to mark off the punctures into very irregular, 

 alternate series, of two and of three rows ; there is a highly 

 polished, impunctate, medio-basal space on the head, but 

 most of it is usually concealed by the overlapping prothorax. 



OCNODUS TRIDENTATUS, n. sp. 



PI. xxxvii., fig. 154. 



Dark castaneous-brown; antennae and palpi paler. 

 Upper-surface glabrous, except for a few short setae in the 

 lateral gutters. 



Head with crowded punctures, quite as dense behind as 

 in front of clypeal suture; clypeal margin rather strongly 

 elevated in front, and lightly incurved to middle; labrum 

 deeply notched, the sides scarcely projecting beyond clypeus: 



