BY W. MACLEAY, JUN., ESQ. 271 



Sect. 1. 

 With simple tubercle over the eye. 



A. With three rows of tubercles on each elytron. 



1. — ACANTHOLOPHUS TRANSITUS. 



Oblongo-ellipticus niger parce cinereo-squamosus, rostro supra 

 rugoso, fronte subexcavata utrinque minute tuberculata, 

 thorace dorso bifariam tuberculato tuberculis planis lateri- 

 bus valide dentato, elytris subangustis seriatim granulatis 

 trifariam tuberculatis lateribusalbido-vittatis. 



Long. 9i lin., lat. 3i lin. 



Hab. Swan River. 



This is quite an Amyderus in appearance. There is a small 

 tubercle on each side of the head beside the eyes. The forehead 

 between is a little excavated. The thorax is strongly tuber- 

 culated on each side of the medial line, the tubercles being flat 

 and extended over a greater width in the middle of the disc. 

 The sides also are strongly dentated by two somewhat flattened 

 compound tubercles. The elytra are granulated in tolerably 

 regular rows, with three rows of strong tubercles, the outer row 

 consisting of four. The sides, which are parallel, are marked 

 with narrow white vittce. 



2. — ACANTHOLOPHUS AmYCTEROIDES. 



Oblongo-ellipticus niger cinereo-squamosus albido-vai-iegatus, 

 rostro medio canaliculato, fronte plana retusa utrinque 

 tuberculo subacuto instructa, thorace dorso bifariam tuber- 

 culato lateribus acute dentato, elytris albido-vittatis sub- 

 seriatim granulatis trifariam tuberculatis tuberculis validis 

 acutis subnitidis apice brevissime mucronatis dehiscentibus. 



Long. 9 lin., lat. 3| lin. 



Hab. King George's Sound. 



This species is a good deal variegated with white vittae and 

 spots. There is a small depressed line in the centre of the 



