274 THE GENEEA AND SPECIES OF AMYCTERID^, 



The long acute spines of the crest, thorax, and elytra of this 

 insect, with its convex arched form, distinguish it from all others 

 of the genus. The spines of the crest are scai^cely connate, and 

 the posterior one is the longest. 



My specimens are from King George's Sound. 



6. ACANTHOLOPHUS BIVITTATUS. Schonh. 



Amycterus bivittatus, Schonh., Gen. et spec, Curcul., vol. VII., p. 74. 



" Oblongo-ellipticus niger parce griseo-squamulosus, fronte 

 rostroque impressis silaceo-liueatis, rostro hasi utrinque 

 tubei-culis duobus connatis parum acutis instracto, thorace 

 dorso lateribusque acute subseriatim tuberculato linea 

 augusta dorsali silaceo- vitta infra-laterali lata albo-squa- 

 mosis decorato, elytris transversim rugosis et granulatis 

 trifariam acute tuberculatis sutura et vittis duabus obliquis 

 disci silaceo- laterali albo-squamosis." Schonherr. 



Long. 5 J lin., lat. If lin. 



Hab. Western Australia. 



The spines on the head are short and not acute in this species. 

 The female is considerably larger than the male, as is the case 

 also in A. hijstrix. 



My specimens are from King George's Sound. 



7. — ACANTHOLOPHUS SPINOSUS. 



Oblongo-ellipticus convexns niger ciuereo-squamosus vittis 

 albidis ornatus, capite utrinque cristato crista Ijispinosa 

 spina posteriori longa acuta, thorace dorso bifariam sex- 

 tuberculato tuberculo anteriore majore arcuato lateribus 

 bispinosis, elytris seriatim granulatis trifariam spiuosis serie 

 externa spinis duabus magnis et duabus parvis anterioribus 

 instructa. 



Long. 8 lin., lat. 3| lin. 



Hab. King George's Sound. 



The head is covered with brownish scales, with a white vitta 

 in the middle which extends over the whole of the rostrum. 



