462 Mr. A. M. Lea on 



On the male of blackburni there is a peculiar streak of 

 clothing on the metasternum and abdomen, but on that 

 species the main portion of it is on the abdomen, whereas 

 on this species it is on the metasternum ; there are other 

 differences also, in addition to the very different clothing of 

 the upper surface. The clothing of both prothorax and 

 elytra is much like that of some specimens of squamivaria, 

 but it is I'eadily distinguished from that species by the 

 under surface of the male; the females of the two species, 

 however, are extremely alike, and I can find no satisfactory 

 characters to distinguish them. It is also close to preiiosa, 

 but that species has the under surface of the male, and the 

 rostrum of tiie female, very different. On the upper surface 

 most of the scales are scarlet, the stramineous ones (some- 

 times almost white) are in numerous small spots on the 

 elytra, and form two spots down middle of prothorax, several 

 on each and one on each side of middle. Each sutural 

 interstice is acutely carinated, the carina on each being 

 quite close to its fellow, so that the suture itself appears to 

 be closely bicarinated throughout its length. 



The female of this species was previously given to me as 

 belonging to the one 1 described under the name oi' Lybaba 

 acuticusta (^ = Diethusa fervida), but this was certainly in 

 error. 



Diethusa niveodispersa, sp. n. 



Reddish castaneous, under surface and parts of legs darker. 

 Densely clothed with sooty scales, with white scales scattered 

 thickly about and on the elytra more or less linear in 

 arrangement; under surface of body and of legs with snowy 

 scales. 



Rostrum long, thin, and feebly dilated from base to apex ; 

 behind antennae with rows of punctures and feeble carinse, 

 in front of same with dense punctures. Scape thin, the 

 length of funicle, inserted two-fifths from apex of rostrum ; 

 first joint of funicle slightly longer than second. Prothorax 

 moderately transverse, with dense punctures. Elytra briefly 

 subcordate, base strongly trisinuate, with rows of oblong 

 punctures, in rather narrow striae; interstices wide, nowhere 

 ridged, with dense, normally concealed punctures. Basal 

 segment of abdomen depressed in middle; apical with a 

 shallow impression. Femora stout, strongly and acutely 

 dentate, each with a small granule in subapical emargination ; 

 front tibise bisinuate on lower surface, the others subfalcate. 



Length 4 mm. 



Hub. New South Wales ; Baan Baa. 



