198 Transactions. 



characteristics, necessitate tlie formation of a separate section to follow- 

 that occupied by Halorhynchus. 



Idus cfficus, Broun. 2576. Man. N.Z. Coleopt., p. 1494. 



Glossy, red, legs paler, antennae and tarsi yellowish, with a few minute 

 setae. 



Rostrum smooth, its front face apparently shaved off or obtusely truncate. 

 Thorax longer than broad, very slightly wider behind the middle than it 

 is elsewhere, depressed at the base, with rather fine but distinct moderately 

 distant punctures, each of which bears a very minute seta. Elytra with 4 

 discoidal stria? on each, these with only 8 or 10 coarse punctures, the sutural 

 grooves broader than the others, the posterior declivity more finely sculp- 

 tured ; interstices indistinctly punctate, with a few inconspicuous slender 

 pallid hairs. 



Abdomen elongate, the basal 2 segments distantly but distinctly punc- 

 tured ; in each puncture there is a depressed comparatively coarse pale 

 seta ; there are none on the 5th. 



(? . Length, | line ; breadth, quite \ line. 



Mount Pirongia. Unique, unfortunately. 



Protogonum, gen. nov. 



Body robust, moderately elongate, sparingly clothed with minute 

 slender indistinct sette. 



Rostrum nearly as long as and in front not much narrower than the ' 

 thorax, curvedly narrowed to about half that width behind ; the frontal 

 portion is angularly dilated at each side, the apex oblique towards the 

 middle and with a slight emargination there. Scrobes oblique, extending 

 from just behind the lateral dilatations to the lower part of the eyes. Man- 

 dibles prominent, bifid at the extremity. Head moderately globose under- 

 neath, its sculptured portion extending nearly midway between the eyes 

 and the thoracic margin. Eyes rotundate, moderately prominent, nearly 

 as distant from the thorax as they are from each other. Scape stout, gradu- 

 ally incrassate, slightly flexuous, inserted just before the middle, and attain- 

 ing the front of the eye. Funiculus with slender setae, the basal 2 joints of 

 almost equal length, 3-5 transverse. Club oblong-oval. Thorax about as 

 broad as it is long, abruptly contracted in front, quite oviform behind the 

 constriction, base feebly bisinuate. Scutellum distinct. Elytra as broad as 

 the thorax, subparallel, biarcuate at the base, gradually narrowed behind, 

 with simple apices. Legs moderately stout and elongate. Femora slender 

 at the base, clavate beyond. Anterior tibiae distinctly uncinate, mucronate 

 at the inner extremity ; the external hooks of the other pairs are curved 

 forwards instead of liackwards, and the inner extremity of each projects 

 as an angular process. Tarsi finely setose underneath, 3rd joint deeply 

 excavate, but hardly at all expanded, so that the lobes are narrow. 



Prosternum truncate in front, its basal portion on a higher level than the 

 middle. Anterior and intermediate coxfe almost equally separated, but 

 much more approximated than in Pentarthrum. Mesosternal suture very 

 distinct, and strongly curved between the coxae. Metasternum equal to 

 the basal 2 segments in length, medially sulcate, and with an angular im- 

 pression behind. Basal 2 ventral segments concave along the middle, their 

 suture very fine and sinuous, 3rd and 4th rather flatter and longer than 

 usual ; 5th with a large circular impression, closely and finely punctate 

 and distinctly pubescent. 



