122 



T. similis, Blackb. When I described this insect I omitted to 

 remark on (and, indeed, to notice) its close resemblance to the 

 European T. scutellaris, Germ.; I scarcely know how to separate 

 it from that species by any other character than the much 

 shorter and feebler frontal sulci of the head, — a distinction, how- 

 ever, sufficiently strongly marked to form a perfectly satisfactory 

 specific difference. 



T. Adelaides, Blackb. A comparison of this species with 

 examples of T. transveraicollis, Macl. (compared with the type 

 by Mr. Sloane) has satisfied me that the two names are founded 

 on one insect Sir W. Macleay's description is quite insufficient 

 to have indicated this identity. Sir W. Macleay's name has 

 priority. 



CILLENUM. 



C. {Bemhidium) Mastersi, Sloane. This insect (described by 

 Mr. Sloane as a Bemhidium) is extremely close to the European 

 C. laterale^ Sam. Its coloring scarcf^ly differs, but it is of 

 decidedly more elongate form and has evidently longer and less 

 stout antenn?e. The genus Cillenum has not been previously 

 recorded as Australian. 



BEMBIDIUM. 



The Australian species of Bemhidium have been reduced to 

 small numbers by Mr. Sloane, with whose conclusions I cordially 

 agree subject to the slight doubt expressed above as to his treat- 

 ment of the distinction between Tachys and Bemhidium. I have 

 (above) removed from Bemhidium two more species that he had 

 left in it, which leaves in it ten species (three of them from 

 'Queensland, named by Macleay, — two of these practically unde- 

 scribed, — unknown to Mr. Sloane or to myself). One of them 

 {B. hipartitum, Macl.) I have conjectured (above) to be a 

 TrecJiodes, but at any rate it is not a Bemhidium as the apical 

 ioint of its palpi is described as elongate. B. amplipenne^ Macl., 

 and sexstriatum., Macl., if true Bemhidia are certainly I think 

 distinct from all of the genus that have been described by other 

 authors. There thus remain only seven Australian species (in- 

 cluding the two described below) that can be confidently referred 

 to Bemhidium. I have the types or thoroughly authentic speci- 

 mens of all of them before me. Their distinctive characters may 

 be tabulated as follows : — 



A. Pronotum widely margined, the hind angles 



strongly explanate ... ... .. ... /ft'jA;.'>-o?i«e?i,9e, Guer. 



^A. Pronotum not as above. 



B. Elytra fully striate or seriate-punctulate. 



C. Head scarcely convex longitudinally in the 



middle between the eyes ... ... Bivermoi, Sloane. 



CC. Head strongly convex longitudinally in the 

 middle between the eyes. 



