18 



of the genus Adelium (family Tenebrionidse). All that can be said 

 is that this type of sculpture is not a sufficient guide to enable their 

 being placed definitely in any single family. 



There are 110 complete specimens in the collection, but a number 

 of separate elytra. In studying these, one has nearly always the 

 advantage of examining two impressions. The elytron being very 

 convex, it follows that it forms a kind of mould, within Avhich a cast 

 of the internal sculpture is formed and preserved. It will be con- 

 venient, therefore, to designate as the mould the concave impression in 

 the rock which preserves the external sculpture, using the term cast 

 for the convex impression which preserves the internal sculpture. 



ADEMOSYNE AUSTRALIENSIS, sp. nov. 

 Plate 4, fig. 3. 



ELYTRON, 3.4 mm. long, 1.2 mm. wide. Sculpture, ten delicate 

 longitudinal interstices, with intercostal punctate striae. Shape, 

 nearly a regular ellipse, margin and suture nearly equally curved, 

 and apex obtusely pointed. Marginal border about same width as 

 intervals between strise, the suture border being wide near the 

 base. Convexity, considerable. 



TYPE : Specs. I2a and 126 (mould and cast) (Plate 4, fig. 3). 

 CO-TYPE : Specs. 13a, 136 (mould and cast), and 43 (mould). 

 (B. D. Coll.) 



OBS : Differs from the genotype in the elytra being less tapered 

 posteriorly, and larger. Closely resembles A. minor, Haiidlirsch, 

 in shape, but the latter is much smaller, and is shown with only 

 seven or eight interstices. 



ADEMOSYNE ANGUSTA, sp. nov. 

 Plate 4, fig. 4. 



ELYTRON, 3 mm. long, 1 mm. wide. Sculpture not completely 

 preserved, but formed by eight or nine strise without punctures on 

 the strise. Shape, a narrow oval, somewhat pointed posteriorly, 

 preserved, but formed by eight or nine low costse without punctures 

 on the strise. Shape, a narrow oval, somewhat pointed posteriorly, 

 with suture and margin equally curved and tapering to the apex. 

 Marginal border narrow. Convexity, low and less marked than in 

 A. auslraliensis. 



TYPF : Specs. 15 and 156 (mould and cast) (Plate 4, fig. 4). 

 CO-TYPE : Specs. 16, 166 (mould and cast). (B. D. Coll.) 



OBS. : -Its narrow shape, low ridges, and absence of punctate 

 strise separates it from all other species of Ademosyne. 



