BY ARTHUR M. LEA. 553 



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dilutius piceum." B. Mastersi, Macleay, is possibly synonymous, 

 but if the quoted remarks are constant it should be distinct. 

 B. rectanguJaris, Macleay, appears to be allied. 



BoTHRiDERES Mastersi, Macl. — I have numerous specimens 

 from New South Wales which were compared and agree with the 

 types. The species is variable in colour; in some specimens the 

 head and prothorax are no darker than the elytra and these IvAve 

 the suture but slightly darkened; in none of my specimens could 

 the head be called "black." The size is very variable. 



BoTHRiDERES viTTATUS, Newm. — Common and widely dis- 

 tributed in New South Wales and Western Australia. I regard 

 suturalis, Maclea}'^, of which I have a specimen from the Rich- 

 mond River, as a small and pretty variety of this species. 



BOTHRIDERES MERUS, Pasc. ; B. Musivus, Pasc. — I am not at 

 all sure that these names appertain to two distinct species, or 

 whether there is but one which is veiy variable in regard to 

 size and to a certain extent in colour. The specimens which I 

 label merus and a specimen so labelled by the Rev. T. Blackburn 

 are larger and duller than those which agree best with the descrip- 

 tion of mifsin/s, but the reverse should be the case. I have 

 specimens from New South Wales, Victoria, and South- Western 

 Australia. 



BoiHRiDERES EQuiNus, Pasc. — I have specimens agreeing with 

 the description of this species which were compared and agree 

 with the type of B. Pascoei, Macleay. 



BOTHRIDERES T.ENIATUS, Pasc. — Of this species Mr. Pascoe says 

 " prothorax with two deep semicircular impressions, the space 

 hetween not punctured in the centre." I have only one specimen 

 agreeing with the italicised remark, but have numerous others 

 agreeing in all other details, and think that it is but an accidental 

 variation; the sutural marking appears to be liable to obliteration. 

 S. Kreffti, Macleay, is possibly synonymous. 



BOTHRIDERES ILLUSUS, Newm. — Mr. Pascoe includes this species 

 in the group having but one strongly marked prothoracic impres- 

 37 



