OF NEW ZEALAND. 1037 



and fifth bead-like, joints 6-10 evidently broader than the preceding 

 ones, eleventh longer than broad. Thorax transverse, cordiform, 

 posterior angles rectangular ; with two abbreviated discoidal im- 

 pressions, and a large one at each side, near the middle ; its punc- 

 tuation similar to that of the head. Elytra nearly twice as long as 

 broad, subtruncate behind, feebly depressed near the base, distinctly 

 punctate. H hid -body Ivali as long again as elytra, finely sculptured, 

 terminal segment yellowish. Tarsi slender, apical joint longer than 

 the other four taken together. Palpi with the last joint much longer 

 than the third, slender. 



C/'«(/ers(f?e rather darker than the upper, similarly clothed, basal 

 ventral segment medially carinate, terminal impressed. 



A much narrower form than 0. liirtcUum, Fauvel, more parallel, 

 &c. 0. sagoloide is another cognate species. 



Length, 1 ; breadth, i line. 



Boatman's, Eeefton. Two specimens, found by Mr. A. T. Cavell. 



1855. O. chalmeri, "-i'- SlmiiiKj, castaneous, head blackish, 

 legs fulvescent, palpi testaceous ; five basal joints of antenuce reddish, 

 remaining joints opaque, densely pubescent, dark-fuscous, apex of 

 each paler. 



Head trigonal, its middle portion nearly smooth, sides more 

 distinctly but finely punctured, and, like the neck, with dense 

 minute sculpture, the occipital fovete distinct. Aiitenncc modeveitely 

 elongate ; tenth articulation transversely quadrate ; third evidently 

 longer than the contiguous ones. Thorax about one-third broader 

 than long, base touching elytra ; the sides a little rounded near the 

 front only, anterior angles rounded but not depressed, slightly nar- 

 rowed behind, posterior angles obtusely rectangular ; with two broad, 

 not shallow, impressions behind the middle, the surface moderately 

 finely punctured, with the same kind of minute sculpture as the 

 head, with a few fine greyish hairs. ScutclUun distinct. Elytra 

 broader than thorax, subparallel, apices slightly curved, outer angles 

 strongly ; punctuation tolerably close, with, here and there, some 

 Itirger punctures ; they are a little depressed near the suture, and 

 clothed with short griseous hau's. Hind-body not longer than elytra, 

 about as broad as they are, closely, finely punctate, bearing slender, 

 elongate, greyish pubescence, and on the middle of the basal segment 

 with iwo small contiguous spots covered with extremely minute, de- 

 cumbent, brassy seta3. Tibice with fine yellow setae, the anterior 

 with three or four slender spines near the extremitv. 



Length, l-^- lines ; breadth, nearly ■§ line. 



Dunedin. One example ; named in honour of its discoverer, 

 Mr. T. Chahner. 



1856. O. micrarthrum, n.s. Shining, dark -chestnut, the 

 thorax and a large oblique space on each elytron paler and redder, 

 legs fulvescent ; six terminal joints of antennte brownish-black, the 

 others rufo-fulvous ; clothed with yellowish-grey hairs, those on 

 elytra shortest. 



