234 REVISION OF THE AMYCTERIDES, iii., 



To this imiiiber, 1 now propose to add the names of three others. 

 The species of tliis genus are the giants of the subfamily, M. draco 

 being one of the hirgest of the Australian weevils. Tlie chief 

 characters lie in the structure of the head and rostrum, in the ex- 

 planate tuberculate prothorax, and in the arrangement of the 

 elytral tubercles. 



The liead is large, with the forehead strongly depressed, the 

 nuddle being triangularly raised or subcarinate ; tliis concavity is 

 bounded by the prolongation ])ackwards of the external, rostral 

 ridges. The rostrum is directly continuous with the head, and is 

 moderately deeply excavate; the apical marginal plate is small, 

 and is subtended by a triangular, depressed area, which, in turn, is 

 bounded posteriorly by the subobsolete, internal ridges; running 

 round the outer side and end of these ridges, is a narrow, horse- 

 shoe-shaped line. The scrobes proper end distant from the e\ es, 

 but these are situated immediately under the ridges on the head, 

 and in the depression continuous with the scrobe, and formed b>' 

 the prolongation backwards of tlie ridges. The eyes, in almost all 

 the species, are ovate and not prominent; the exception being .1/. 

 Boisdurali, which has round and prominent eyes. 



The prothorax, in all except M. Boisduv(di, is wide and ampliate, 

 and the structure of its upper surface comprises («) plane, more or 

 less smooth areas, a median and two sublateral, (6) groups of 

 tubercles, a median and a lateral group on each side, (r)smaller 

 granules along anterior and posterior margin. The median 

 tubercles api)ear to l)e variable in number in the one species; the 

 lateral group shows good specific differences in the arrangement of 

 the tubercles. The elytra, as a rule, have four rows of strong 

 tubercles, one row on the second interstice, from in front of middle 

 to apex; one row on the third interstice from base to declivity; 

 two rows more laterally, the inner one extending from the middle 

 to the apex, the outer one from the humeral angle to opposite and 

 external to the commencement of the inner row, thence rapidly 

 becoming obsolete. For convenience of description, I have called 

 these rows 1, 2, H, 4, their relative positions being always the same. 

 As the seriate punctures are, in most eases, very small and indis- 



