BY THE REV. T. BLACKBURN. 67 



Chaud., is extremely like some vars. of T. pacifica, Er., and in my 

 opinion is of doubtful validity j T. nigricollis, Macl., is probably 

 a good species ; there is nothing in the description of T. paUicli- 

 collis, Macl., to distinguish it from T. jjacifica ; Sir W. Macleay's 

 three species from N. W. Australia are said to have the posterior 

 elytral spot " near " the apex, which seems to distinguish them 

 from all the forms of Trigonothops known to me, the posterior 

 elytral spot in all these being at the apex. 



I may add that the description of Dromius tridens, Newm., 

 points to the probability of its being a Trigonothops, and that 

 there is nothing in the brief description inconsistent with its being 

 founded on the same species as T. pacifica, Er., in which case 

 Newman's name would have priority. 



Demetrias tweedensis, sp.nov. 



Elongatus ; rufo-piceus, subtus dilutior ; prothorace capiti 

 longitudine latitudineque sequali, longitudinaliter profunda 

 sulcato, transversim subrugato, latitudine longitudini aequali, 

 antice leviter emarginato postice subbisinuato, antice quam 

 postice manifesto angustiori, angulis anticis baud productis, 

 latitudine majori sat longe ante medium posita, lateribus 

 leviter arcuatis ante basin sinuatis, angulis posticis extrorsum 

 directis parum acutis ; elytris sat fortiter punctulato- 

 striatis, ad apicem emarginato-truncatis, truncaturse angulo 

 externo obtuso interno sat acuto, interstitiis convexis sparsim 

 subtiliter punctulatis, interstitio 3° postice punctura singula 

 instructo. [Long. 5, lat. If lines. 



This seems to be a genuine Demetrias, though on a casual 

 glance it has much the appearance of a Xanthophoia, but the form 

 of its palpi and other characters connect it with the former genus. 

 It is very like a species from the Richmond River (N.S.W.) which 

 seems likely to be D. rufescens, Macl., but is much larger and 

 diflfers in the form of the prothorax, which is by measurement 

 fully as long as wide (to a casual glance it looks longer), and 

 evidently narrower across the front margin than across the base, 



