some Australian Curculioiiidae. 4G1 



from all others of tlie allied genera, by the abdominal 

 tubercle. Some specimens resemble some of D. concinna, 

 D. nigrovaria, and D. farnelica. It has been referred to 

 Diethusa on account of its compact form and dense clothing. 

 The clothing on the under surface is white, and on the legs 

 white or in parts pale ochreous. On the prothorax there is 

 usually a large sooty patch in the middle, ochreous scales at 

 the sides of same, and then white ones. On the elytra the 

 ochreous scales are in the majority, but there are numerous 

 spots or fasciae of sooty scales, and almost equally numerous 

 white spots. On the female the sooty spots are sometimes 

 entirely absent, on such specimens the majority of the scales 

 on the upper surface are somewhat golden, mixed with spots 

 of white. 



•Diethusa metasternalis, sp. n. 



^ . Reddish castaneous. Clothed with scarlet and strami- 

 neous scales on upper surface, under surface mostly with 

 white scales, but with a conspicuous line of golden setse. 



Rostrum rather long, thin, and parallel-sided ; on basal 

 half: with coarse punctures in lines, elsewhere with smaller 

 but clearly defined ones. Scape thin, the leiigtli of funicle, 

 inserted one-third from apex of rostrum, first joint of 

 funicle about as long as second and third combined ; club 

 rather large and wide. Prothorax lightly transverse ; with 

 dense, partially concealed punctures. Elytra subcordate, 

 base strongly trisinuate ; with rows of large, partially con- 

 cealed punctures ; interstices wide, with dense, normally 

 concealed punctures, the lateral ones, commencing with the 

 seventh, more or less distinctly ridged along middle ; suture 

 acutely carinated. Metasternum and basal segment of 

 abdomen with a deep sulcus containing the line of golden 

 setse ; apical segment with a wide shallow impression. 

 iemora stout and strongly dentate. 

 Length 4-4^ mm. 



$ . Differs in being rather more robust, rostram decidedly 

 longer, thinner, and smoother, with smaller and sparser 

 punctures, antennae inserted not so close to apex of rostrum, 

 metasternum and abdomen not sulcate in middle, and with- 

 out the line of setae, apical segment not impressed, and four 

 front tibiae with the apical hook to each commencing at the 

 summit of the apical slope, instead of more than halfway 

 down the same, 



Hab. New South Wales : Ourimbah and Sydney (G. E, 

 Bryant), Sydney {H. W. Cox). 



