Il8 COLEOPTERA 



Head, relatively, rather large, with prominent cheeks, smooth 

 between the antennae, elsewhere distinctly punctate, with two large 

 punctures near the base. Antenna rather short, their fourth and fifth 

 joints small, third as long as the exposed part of the first but more 

 slender than it, especially at its base, joints six to ten transverse, eleventh 

 not twice as long as the tenth, obtuse. 



Prothorax considerably sinuously narrowed behind the middle ; with 

 two broad furrows, deepest behind, not quite reaching the base or apex, 

 the longitudinal line dividing them smooth, but the remainder of the 

 surface distinctly punctate. Elytra longer than broad, a little wider 

 than thorax, their sides parallel ; they are punctate-striate, the strife, 

 however, not reaching the base. Abdomen punctulate and finely 

 pubescent. 



The insect is parallel-sided, with short, compact antennae, and large 

 head ; the latter character will lead to its recognition. This and the 

 two following species may be placed together in one genus, on account 

 of the large sub-quadrangular head, &c. 



Length, ii ; breadth, nearly \ line. 



I found this new form under bark at Parua. 



220. O. genalis, n.s. Shining pale reddish chestnut, head and 

 antennae reddish, the apical portion of each elytron with a large 

 blackish space, legs similar in colour to the prothorax. 



Head large, almost quadrangular, its hind angles distinct but not 

 acute and distant from the small not at all prominent eyes; the labrum 

 and frontal part smooth and yellowish ; its surface is finely punctured, 

 most sparingly on the middle ; with two broad, elongate, basal furrows, 

 and having the ocelli situated near the neck ; the mandibles are red and 

 shining. 



Antenna gradually incrassated, joints six to ten slightly laxly articu- 

 lated and transversal, eleventh ovate and obtuse. 



Prothorax transverse, finely margined, not quite so large as the head, 

 a good deal, yet hardly curvedly, narrowed posteriorly, its anterior 

 angles obtuse and a little depressed, the posterior rectangular, its base 

 rounded ; there are two broad dorsal grooves, having the appearance of 

 a broad discoidal depression defined by a slightly raised median and 

 two lateral spaces, these elevated portions are smooth, the rest mode- 

 rately punctured. Scutellum sub-triangular, smooth. Elytra rather 

 broader than and nearly twice the length of the prothorax, sub-truncate 

 behind ; almost punctate-striate, their sculpture, however, less obvious 

 behind. Abdomen rather longer than the elytra, punctulate, with 

 yellowish pubescence, which, on the rest of the body, is hardly dis- 

 cernible. 



The insect, if it were not for the posterior contraction of the pro- 

 thorax, would be quite parallel-sided ; it is flattened above, with a broad 

 neck. 



One example has the head black. The form of the head will serve 

 to distinguish the species. 



Length, iiii ; breadth, 1 line. 



I found this species in the forests bordering Whangarei Harbour. 



