28 E. W. Ferguson. 



angles subtruncate ; disc with punctures open, shallow, not very 

 distinct ; interstices slightly raised, the third and fifth more so 

 than the others ; with slight tuberculiform elevations at irregu- 

 lar intervals, the second interstice with 5 ; the third with 8-9 

 indicated, the basal ones hardly more elevated than the inter- 

 stice, which is here subcostiform, the apical ones small, granuli- 

 f orm, but more distinct, extending half-way down declivity ; 

 fourth with 3-4 small tubercles; fifth subcostiform the individual 

 tubercles only indicated by setae, somewhat more distinct pos- 

 teriorly; sixth with a continuous row of small separate granuli- 

 form tubercles; seventh and lateral interstices with tubercles 

 obsolete. Venter somewhat flattened along middle ; apical seg- 

 ment with posterior margin strongly bisinuate, the median por- 

 tion produced as a rounded lobe, somewhat depressed. The 

 last dorsal with undersurface emarginate to correspond with pro- 

 jection of apical ventral segment. Legs not notched ; anterior 

 tarsal joints asymmetrical, but less markedly so than in some 

 of the allied species. 



$ Agrees with male ; elytra somewhat more ovate ; venter 

 convex, apical margin produced ventrally but not bisinuate, with 

 a small emargination at extreme apex, filled with a few stout 

 -setae. 



Dimensions. — c? 16x6 mm.; $ 16x6 mm. 



Hab. — Victoria, Portland District (H. W. Davey and J. E. 

 Dixon). 



I am indebted to Mr. H. W. Davey for a series of this species. 



A female given me by Mr. J. E. Dixon differs in being larger 

 (17x8 mm.), and in the much lighter clothing; the head and 

 prothorax are conspicuously trivittate with white, while the 

 median line of elytra, and much of the lateral portions of the 

 disc are covered with similarly coloured clothing. The sculpture 

 is much as in the type, except that the tubercles are slightly 

 larger; the apical ventral segment is lightly impressed in the 

 median line, and the apex is as described. 



S. daveyi belongs to a group of closely allied species, for 

 whose correct determination a knowledge of both sexes is neces- 

 sary; thus the present species is close to S. inornatiis, from the 

 <T of which it can only be distinguished by its less obliterate 

 •sculpture, whereas the two females are abundantly distinct. 



