274 COLEOI'TKKA. 



separated from the lateral margin by a slight carina, the whole basal region 

 punctate. Elytra oviform, broader than and nearly thrice the length of 

 the thorax, with strongly rounded shoulders and distinct marginal channels ; 

 sutural striae well marked throughout, the next pair less so, and more or 

 less finely punctured, those beycmd are less definite and become obsolete 

 posteriorly ; 3rd interstices tripunctate, the usual apical carinac are well 

 developed. 



Male. B&sa,\ joint of anterior tarsi oblong, its inner extremity ])ro- 

 ionged, the next similar but shorter. 



Fern. — Basal joint oblong, 2-4 cordiform but smaller. 



0. pygmeatKS, 2618, has a cordiform, impunctate thorax, with narrower 

 lateral margins and less distinct posterior angles, and the basal foveae are 

 somewhat prolonged anteriorly. It is the nearest species. 



Length, 3-2 mm. ; breadth, 1| mm. 



Ben Lomond, Otago. One of each sex found by Mr. A. Phiipott, of 

 Invercargill, in December, 1912. 



Group Feronidae. 



3685. Trichosternus blandellus sp. nov. Tricliostennts Chiiudoir. Man,- 

 N.Z. Coleopt., p. 31. 



Elongate- oblong, only slightly convex, shining, variegate ; the nigrescent 

 parts faintly violaceous, the lateral channels and basal fossae of the thorax 

 and the sides of elytra bright metallic green, the head and thoracic disc 

 slightly viridescent, elytra somewhat cupreous on the middle ; antennae, 

 labrum, mandibles, legs, and palpi more or less rufo-piceous, these last with 

 rufescent tips. 



Head rather narrower than thorax, smooth, frontal impressions moderately 

 deep and elongate ; with a setigerous puncture at each front angle of the 

 forehead and a pair near each eye ; labrum widely emarginate. Eyes pro- 

 minent, the genae somewhat swollen below them. Thorax a third broader 

 than long, widest before the middle, moderately rounded there, gradually 

 narrowed towards the rectangular posterior angles, its apex moderately in- 

 curved, the base less so ; disc almost quite smooth, with a slight impression 

 near each front angle, basal fossae large and deep, extending almost to the 

 angles and with a slight impression jjetween them, median groove hardly 

 attaining the apex ; lateral margins and channels well developed, the latter 

 somewhat expanded behind. Scutellum almost smooth. Elytra oblong, 

 with dentiform shoulders, a little wider than thorax at the base, hardly 

 thrice its length, moderately sinuate and narrowed towards the extremity, 

 their sides broadly explanate behind ; they are finely punctate- striate, and 

 have short scutellar striolae ; interstices plane near the suture, convex 

 towards the sides, 3rd, 5th, and 7th evidently broader than the others, 

 these last usually distinctly sexpunctate, the 3rd bipunctate behind the 

 middle. 



Legs moderate, intermediate tibiae laterally compressed and prolonged 

 at the extremity. 



Underside brilliant black, head viridescent, prostcrnal jirocess seti- 

 gerous, terminal ventral segment quadripunctate at apex. 



When placed alongside the male of T. antarcticiis, 65, this species is seen 

 to be narrower and less convex, the alternate interstices of the elytra are 

 unmistakably broader, so that the 4th and 6th are little more than half the 

 width of the 3rd or 5th. whilst the sutural ones are flat : the coloration 

 also is dissimilar. No other species resembles it. 



