23 



between the punctures being about half the width of the interstices. 

 Marginal interstice becoming wider and slightly more prominent 

 towards the apex, where it sharply tapers off. Sutural border flat 

 and about half the width of the interstices, marginal border narrower 

 but prominent. The cast shows the interstices to be faintly granulate 

 on the interior surface, the mould showing the exterior to have a more 

 marked and clearly defined granulation. 



TYPE : Spec. 50a and 506 (mould and cast) (Plate 4, fig. 7). 

 (B. D. Coll.) 



OBS. : A beautifully preserved specimen of a very typical 

 Tenebrionid elytron. I have dedicated the species to Mr. Willcox, 

 who assisted in the collecting of the Ipswich fossil flora and fauna 

 many years ago, and who is now engaged on this work. 



Family CERAMBYCID^E. 

 Genus MESOTHORIS, gen. nov. 



Resembles the recent Australian genus Thoris in the shape and 

 sculpture of the elytra, which are marked all over with definite 

 areolse separated by longitudinal and transverse ridges. 



TYPE : Mesoihoris clathrata, sp. nov. 



MESOTHORIS CLATHRATA, sp. nov. 

 Plate 4, fig. 6. 



ELYTRON 7.2 mm. long, 2.5 mm. wide. Shape, margin much 

 curved, suture less so, apex bluntly pointed, base somewhat narrow. 

 Sculpture, nine longitudinal ridges, with intersecting cross-ridges, 

 together forming a network or areolate structure. The pittings 

 are variably depressed, generally round but occasionally oval and 

 irregular, the diameter being rather less than that of the ridges. 

 The ten rows of areolse formed by the nine ridges and cross-ridges 

 diminish in number, with very little convergence, towards both apex 

 and base, the areolae retaining a nearly uniform size all over the elytra. 

 The marginal border is slightly narrower than the sutural one, the 

 width being less than that of the costal ridges, both being rather 

 well-defined and finely granulate. 



TYPE : Specs. 48a, 486 (mould and cast) (Plate 4, fig. 6). 

 CO-TYPE : Spec. 49 (cast, pair of elytra) ; Specs. 5la, 516 (mould 

 and cast). (B. D. Coll.) 



