117 



short stout palpi (which nevertheless are of the Trechus type) 

 suggest a doubt whether it might not suitably receive a new 

 generic name. Until there is reason to believe that most of the 

 Australian Trechides are known it seems to me best to attribute 

 to Trechus all the species presenting the following characters 

 (aDcl not differing from Trechus by any other obviously generic 

 peculiarity), viz : — Anterior tarsi of male with the basal two 

 joints (only) dilated ; antennae with only the basal joint less 

 pubescent than the other joints ; apical joint of palpi of normal 

 length and of elongate-conic form (pointed at apex) ; frontal 

 sulci of head arched, and continued hindward towards (or 

 behind) the hind margin of the eyes. 



The number of Australian species that have been attributed 

 to Trechus is, I believe, eleven. Four of these were described 

 by Sir W. Macleay and could not be identified from the descrip- 

 tions. I have, however, seen the types, all of which are from 

 Queensland. I have already (Proc. L.S, N.S.W., 1892, p. 97) 

 reported that three of them belong to other genera than Trechus 

 while the other {concolor) I could not feel confident about, the 

 specimen being a female and material for comparison with other 

 species not being at hand ; it did not, however, seem to me to be 

 a Trechus. Of the remaining seven I have before me types or 

 co-types of all except one — T. nite?is, Putz. That species is 

 probably near my T. Tasmanics^ but it is evidently not identical 

 as it is described as having all its elytral strise distinct except 

 the seventh and the base of the prothorax very little more than 

 half as wide as the the front. The following table will indicate 

 characters by which the already named species of Trechus may 

 be distinguished — those attributed to T. nitens being founded on 

 the description only. 



A. Prothorax not narrower at base than on front margin. 

 B. Elytra fully striate. 



C. Interstices of elytral striae very strongly 



convex near apex ... ... ... Victorice, Bldickh. 



CC. Interstices of elytral strise not oi but little 

 convex. 

 D. Prothorax strongly transverse... ... diemenensis, Ba.tes. 



DD. Prothorax very slightly transverse ... suhornatelhis, B\a.ckh, 

 BB. Elytra with seventh and eighth strise not, or 

 scarcely, traceable. 

 C. The elytral strise strongly punctulate ... baldieiisif, Bl&okh. 

 CO. The elytral strise non-punctulate ... solid ior, BlaiCkh. 



AA. Prothorax distinctly narrower at base than on 

 front margin. 

 B, Elytra fully striate ... ... ... Simsoni, Blsickh. 



BB. Elytra with only the seventh stria wanting nitens,, Putz. 

 BBB. Elytra with only the three or four inner 



strise distinct ... ... ... Tasmaiiire, B\a.ckb. 



T suhornatellus, sp. nov. Minus elongatus ; subovatus ; sat 

 convexus ; sat nitidus ; piceo-niger, palpis antennarum basi 



