298 THE GENERA AND SPECIES OF AMYCTERID^. 



Long. 6 lin.j lat. 2 lin. 

 Hab. King George's Sound. 



The tubercles on the rostrum are elevated, while those on the 

 forehead are veiy small. The tubercles generally are more 

 spinose than in the other species, and there are only two rows of 

 them on each elytron, the posterior tubercles on each row being 

 the largest. The whole insect is of a narrow elongate form. 



4. — Htborhtnchus rugosus. 



Oblongus niger cinereo-squamosus, rostro fronteque subtuber- 

 culatis, thorace rugose margine antico subelevato dorso 

 medio impresso lateribus baud ampliato, elytris augustis 

 rude punctatis valde rugosis postice trituberculatis antice 

 tuberculis humeralibus suturahbusque antrorsum productis. 

 Long. 7 lin., lat. 2^ lin. 

 Hab. King George's Sound. 

 In appearance this insect differs very much from the rest of 

 the genus, and indeed from every other insect of the sub-family. 

 It has no crest on the head or rostrum. It has no tubercles on 

 the thorax, while the usual lines of tubercles on the elytra may 

 be said to be represented only by the terminal tubercle of each. 

 The structure and sculpture of the head and rostrum are, however, 

 on the same plan as those of the other species, but the rugosities 

 are nowhere elevated into tubercles. The thorax is narrow and 

 rugose, with the anterior margin rather elevated. The elytra are 

 of an uniformly transversely rugose appearance, rather elongate, 

 flat on the back, and slightly compressed laterally. Each elytron 

 has three large tubercles, one near the suture where the declivity 

 of the elytra commences, which may be supposed to be the termi- 

 nal tubercle of what in the other species would be the first row of 

 tubercles ; another outside, and a little anterior to it, represents 

 the termination of the second row of tubercles, and the third, 

 further out and nearer the apex, represents the third row. The 

 humeral angles and suture are also furnished with tubercles pro- 

 duced forwards. The antenna are slight. 



This insect in various ways indicates an approach to the 

 EuomidoB. 



