BY E. W. FERGUSON. 699 



mostly by single spaciinens, which I have thought better to leave 

 undescribed for the present. 



Of the species with deeply emarginate intermediate tibiae, S. 

 Mastersi is the most distinct. The others are closely related, 

 inter se, and might, perhaps, be more properly regarded as 

 geographical or local races. 



Subgroup C contains, at present, but one described species. 



Table of Species, Group i. 

 Subgroup A.— Elybral interstices all more or less tuberculate; intermediate 



tibise not notched. 

 1(4). Anterior tarsal joints symmetrical. 

 2(.3). Tubercles varying in size, all distinct and in single series. 



a.Size large, broad; tubercles large, not clothed. ..*9. Waterhousei Macl. 



ft.Size large; tubercles smaller, clothed at base S. Adelaides Macl. 



c.Size moderate to large, narrower; tubercles distinct, smaller, 



more completely clothed.... 5. vittatus Macl. 



o^.Size moderate to smaller; tubercles less distinct, especially 

 at the base of the third interstice, completely clothed 



S. vittatus Macl., var. ? 



e.As in d, but setas yellowish (doubtful species) S. confmus Macl. 



/.As in c, but without clothing above, setae yellowish 



S. irregularis Macl. 



3(2). Tubercles small, granuliform, in double series at base of third 



interstice . S. oblongatus, n.sp. 



4(1). Anterior tarsi asymmetrically dilabate on the inner side of the 



second and third joints in S . 

 5(8). Apical ventral segment tuberculate on either side of median 



channel in <5 . 

 6(7).Intrastrial ridges prominent ; scape comparatively strongly 



incrassate S. trislis Boisd. 



7(6). Sculpture more obliterate than in S. tristis; scape more slender 



S. sordidus Macl., (S. acuminatus Macl.). 



8(5). Apical ventral segment without tubercles in J S. inornatus Ferg. 



Subgroup B.— Intermediate tibise with astrong subapical emargination, 

 9(12).ProthoraciG tubercles rounded. 



10(11). Third elytral interstices costiform from base to edge of de- 

 clivity S. dimidiatus Macl. 



11(10). Elytral interstices regularly and evidently tuberculate 



S. regularis Ferg. 



l2(9).Prothoracic tubercles more or less elongate and obsolescent in 

 the centre. 



