BY W. MACLEAY, ESQ., F.L.S. 323 



Helluosoma aterktmum. 

 Long. 8 lin. 



Nigrum subnitidum albo-hirtum, thorace cordato subquadrato 



punctato medio piano anguste canaliculate, elytris thorace 



latioinbus planis punctatis subleviter striato-punctatis, an- 



tennis tarsisque fulvo-liirtis. 



This species is from Cape York. It is easily distinguished 



from H. atfum Casteln, by its broader and flatter form, less 



elongate thorax, finely striated elytra, and hairy clothing ; and 



from M. cy a Ileum and cj/anipenne — the only other described 



species at all resembling it — by difference of colour, more elongate 



thorax and smoother elytra. 



GiGADEMA DaMBLII. 



Long. 9| lin. 



Nigrum subopacum, thorace punctato cordato subquadrato, 

 elytris octo-sulcatis sulcis biseriatim punctatis medio striatis, 

 corpore subtus nitido. 

 This insect is also from Cape York, and is very like G. sulca- 

 tum. In fact the only important difference is to be found in the 

 form of the thorax whicli in sulcatum is shorter and more broadly 

 rounded than in the present species. The facial grooves near the 

 eyes are more strongly marked also in this insect. 



Enigma parvdlum. 

 Long. 6 lin. 



Cyaneum nitidum hirtum punctatum, capite subviridi antice 

 nigro, thorace cordato trans verso postice valde angustato 

 naedio leviter caualiculato, elytris punctatis striato-punctatis, 

 corpore subtus subviridi glabro. 

 This insect is labelled " New Holland," a mark indicating 

 simply that I have no record of the locality from which it came, 

 nor how I got it. I am pretty sure, however, that it must have 

 come from the Clarence or Richmond River districts. It is the 

 smallest of the genus, and differs much from the other species in 

 the form of the thoi'ax, which is more like that of a Helluosovia. 

 Indeed its resemblance generally to Helluosoma respl67idens Cas- 

 teln. is very great. 



