150 ON THE SCAEITIDJE OF NEW HOLLAND, 



This insect is black and shining, with a slight clash of that 

 bronzy lustre, which seems very fVequ.ently to be found both in 

 this genus, and in Proinecoderus. The head is drooping, with 

 two short parallel longitudinal depressions in front terminating 

 at the labrum, and connected together in the middle by an in- 

 distinct one that is transverse. The thorax is longer than broad, 

 truncate in front and behind, with an indistinct medial line, and 

 transverse striolse that are scarcely visible. The elytra are rather 

 broader than the thorax, and twice its length, somewhat truncate 

 in front, rounded at the apex, and with the sides nearly parallel. 

 On each elytron there are four series of thinly spread irregularly 

 shaped shallow depressions filled with punctures ; these rows 

 commence at the base and terminate about a third of the length 

 of the elytra from the apex, which space is densely granulated. 

 The fore tibite are tridentated externally, the apical tooth being- 

 broad, compressed laterally and scarcely recurved, while the 

 other two teeth are small. The tooth on the intermediate tibias 

 is of a triangular shape. 



The mandibles in this species are acute and arcuated, and 

 the last joint of the palpi is securiform. 



2. — Gnathoxts humekalis. 



Niger nitidus, capite autice utrinque sulcato, thorace oblongo 

 medio canaliculate puncto utrinque impresso, elytris antice 

 Isevibus postice granulatis in medio parce punctato-foveo- 

 latis, tibiis anticis extus tridentatis. 



Long. 7| lin., lat. 3 lin. 



Hab. South Australia. 



Black and shining with a slight bronzy reflection. The head 

 is like that of the preceding species, drooping, with two short 

 longitudinal grooves on the face. In this species, however, these 

 grooves are not so parallel as in the last, while they are joined 

 in the middle by a distinct transverse impression. The thorax 

 is longer than broad, has the medial line distinct, is covered all 

 over with fine transverse striolaj or wrinkles, and has a shallow 

 puncture or depression near each side. The elytra are shaped 

 as in the last species, are smooth at the base, closely granulated 

 at the apex, and have a few punctured depressions scattered over 



