on the Species of Amycterus. 77 



tuherculato : elytris transversim rugosis trifariani tubcrculatis, 

 tubercLilis parvulis, posticis, majoril)us, conicis. 



Long. Corp. rostr. incl. 8 lin. 



Patria Nova HoUandia, ad " Adelaide." 



This species belongs to section I. A. a. of the table, and is at 

 once distinguished from others of that section by the small size 

 of the tubercles, which are arranged in three rows on the elytra ; 

 it should follow A. Marshami in the series. 



The forehead is depressed, and separated from the rostrum by 

 a transverse ridge, which is subinterrupted in the middle : the 

 rostrum is bounded on either side above by a ridge, which is 

 produced into a vertical bifurcated process immediately in front 

 of the eye, the process is somewhat recurved and rather acute, 

 and the anterior division of the bifurcation is small : the same 

 lateral ridge of the rostrum is again produced in front, above the 

 point of the insertion of the anteimae, so as to form a conical tu- 

 bercle at that part : two ridges extend from the base of the rostrum 

 above, where they are separated by a groove, and diverge as they 

 proceed forwards towards the two conical tubercles last mentioned. 

 The thorax is about equal in length and breadth, and about half 

 the width of the elytra: its broadest part is rather in front of the 

 middle ; the dorsal surface is moderately convex, and presents 

 two rows of about six tubercles, and these are conical, if we ex- 

 cept the two foremost, which form short crests, in front projecting 

 partly over the head : besides these, there is a small tubercle on 

 the fore part, about midway between the middle and the lateral 

 margin ; the sides of the thorax are provided with three acutely 

 conical tubercles, two of which are united at their bases, and are 

 situated rather in front of the middle line ; the foremost of these 

 is the larger, and the third tubercle is placed about midway be- 

 tween these and the base ; a transverse groove is seen towards the 

 fore part of the thorax, and a similar groove is situated towards 

 the hinder margin. The elytra are oblong ovate ; convex, and 

 slightly mucronate at the apex : they are somewhat irregularly 

 punctate-striate, and transversely rugose, the interstices have 

 minute tubercles, in series, but there are three rows of more dis- 

 tinct tubercles (very small as compared with most other species 

 of the genus) ; of the innermost row, which belong to the second 

 interstice, the tubercles are scarcely more apparent, on the basal 

 portion of the elytra, than those of the adjoining interstice, but on 

 the posterior half there are four or five, which are larger, and the 

 hindermost of these is the largest, and of a conical form (the 



