OF NEW ZEALAND. 987 



head and legs rufo-piceous, the mandibles and basal joint of antennae 

 dark-red, tarsi and palpi paler. 



Head with well -marked interantennal impressions; labrum 

 truncate ; eyes prominent. Antenna reaching the intermediate 

 femora, the first three joints and the base of the fourth glabrous ; 

 third evidently longer than fourth, nearly twice the length of- the 

 second. Thorax one-fifth broader than long, the sides moderately 

 rounded, somewhat narrowed behind the middle, a little sinuate in 

 front of the rectangular basal angles ; basal fossae narrow and elon- 

 gate, situated half-way between the middle and the sides, with a 

 feeble impression near the latter ; it is nearly smooth ; the median 

 channel does not quite reach the base or apex, both of which are 

 subtruncate. Scutellutn estriate. Elytra about one-third broader 

 than the thorax, and double its length, oblong-oval, sinuously 

 narrowed behind; each with five deep, regular, impunctate striae, 

 the sixth and seventh not so deep, very freely impressed sometimes ; 

 there are no scutellar striolae. There are two setigerous punctures 

 on each side of the last abdominal segment. The prosternum is 

 longitudinally striate near the sides. 



Like the Australian R. duella, but with a larger and broader 

 thorax, rather longer labrum, broader elytral grooves, and more 

 convex interstices. There is, apparently, only one seta on each 

 side of the thorax, placed just before the middle. The coloration, 

 too, is different. 



Length, 5J ; breadth, If lines. 



Howick. One female. 



Trichosternus. 

 1774. T. COmpresSTlS, n.s. (Sharp; Trans. Roy. Dub. Soc., 



Nov., 1886, p. 366.) Niger, supra fusco-aeneus, limbo anguste 

 viridescente, antennis pedibusque piceis ; prothorace anterius minus 

 lato, prope angulos anteriores depresso, angulis posterioribus rectis ; 

 elytris sat profunde striatis, striis impunctatis. 



Long., 21-23mm. 



This is one of the allies of T. sylvius, Bates, a group of species, 

 or perhaps varieties, very difficult at present to distinguish ; it is, 

 however, not so green in colour as T. sylvius ; the striae of the 

 elytra are almost impunctate, and the thorax is rather longer, the 

 basal portion, as shown by the sinuation at the sides, being longer, 

 and the male front tarsi considerably less dilated. The hind angles 

 of the thorax are not at all directed outwards, and are nearly rect- 

 angular, very slightly obtuse ; the tooth formed by the basal margin 

 of the wing-case is very distinct. T. rectangulus, Chaud., and 

 T. capito, White, have the thorax broader at the front margin, and 

 this is also the case with T. aucklandicus . 



Picton. Helms; a series of ten individuals, showing but little 

 variation. 



1775. T. pplychaetus, n.s. Black, shining, sides and base of 

 thorax tinged with bluish-green, the palpi and front tarsi pitchy-red. 



