1038 COLEOPTERA 



Head moderately broad, finely, regularly, and moderately closely 

 punctured, frontal impressions elongate, posterior small, round ; 

 genae a little dilated behind the eyes ; neck nearly smooth. Antennae, 

 moderate, fourth joint small and bead-like, tenth transverse. Tho- 

 rax one-third broader than long, sides narrowed but nearly straight 

 behind, rounded elsewhere, basal angles quite rectangular ; rather 

 evenly and finely punctate, discoidal impressions rather broad and 

 shallow. Scutellum almost smooth. Elytra quite parallel-sided, 

 oblong, apices truncate along the middle ; dorsal impressions rather 

 broad and long, so that the suture appears a little raised ; closely 

 and finely punctate. Hind-body not longer than elytra, scarcely as 

 broad, very finely and densely sculptured, last segment very narrow 

 and short. 



The small fourth antennal joint, and the fact that only four 

 broad dorsal segments are exposed, in conjunction with the slender 

 simple tibiae and small tarsal claws, render its identification easy. 



Length, 1^ lines ; breadth, f line. 



Stratford, near Mount Egmont. One female. 



1857. O. COgnatum, n.s. Glossy, nigro-castaneous, thorax 

 castaneous, legs rufo-testaceous ; tarsi and palpi fulvous ; five basal 

 joints of antennae reddish, the others dark-fuscous ; nearly nude, 

 hind-body only pubescent, with minute greyish hairs. 



Head broadly trigonal, a little uneven, except the smooth frontal 

 portion, distinctly punctate ; frontal impressions rather broad, not 

 deep, the occipital small and round. Thorax transverse, sides 

 rounded towards the front, sinuously narrowed behind ; basal angles 

 rectangular, anterior a little depressed ; discoidal sculpture like 

 that of the head, nowhere impunctate ; its two depressions mode- 

 rately shallow, the sides a little flattened towards the base and with 

 fewer punctures there, the lateral impressions broad, extending from 

 near the base to beyond the middle. Scutellum with minute sculp- 

 ture near the base. Elytra broader than thorax, quite oblong, the 

 apices, conjointly, forming one slight broad curvature, but strongly 

 rounded at the angles ; their punctuation in rows, with longitudi- 

 nally-raised intervals, so as to appear striate. Hind-body just about 

 as long and broad as the elytra, finely sculptured. Tibice, with fine 

 yellow setae. 



No. 216 is, without doubt, its nearest ally ; the thoracic im- 

 pressions are more strongly marked, but are without the smooth 

 median interval and borders ; in both species the frontal impressions, 

 when examined sideways, appear to extend from the forehead to 

 near the base, and seem to be limited in front by raised margins, 

 which, however, do not extend right across ; 0. sulcithorax is more 

 brightly coloured. 



Length, 1-J- lines ; breadth, nearly f line. 



Tuakau, Lower Waikato. One individual. 



1858. O. Hionilifer, n.s. Slender, subdepressed, elongate, a 

 little shining, smoky-brown, legs fuscous and testaceous, tarsi and 

 palpi obscure-testaceous. 



