NEW ZEALAND COLEOPTERA. 



PART VII. 



Group-FERONIID^E. 



Trichosternus. 



2434. T. Crassalis, n.s. Oblong, robust, moderately convex ; 

 nitid, head and thorax greenish-black, elytra cupreous (green), legs 

 and underside black, antennae, palpi, and' tarsi piceous, tips of the 

 palpi red. 



Head with curvate frontal impressions ; the genae dilated below 

 the prominent eyes. Antenna rather slender, the three basal joints 

 glabrous, joints 2-4 compressed near the base. Thorax 5 lines wide, 

 3f long, widest before the middle, almost regularly rounded near 

 the front, narrowed but not sinuate behind ; posterior angles rect- 

 angular, not projecting ; base and apex incurved ; disc convex, the 

 curved frontal impression well marked, and somewhat foveate at the 

 extremities, dorsal groove deeper near the frontal and basal margins 

 than on the middle, basal fossae large, the intervening space de- 

 pressed. Scutellum broad. Elytra rather wider than the thorax, 

 their sides a little curved, sinuate apically, shoulders moderately 

 dentiform ; they are punctate-striate, the punctures, however, are 

 rather fine ; interstices convex, the fourth and sixth much reduced 

 in breadth, the third with three or four rather small punctures, 

 numerous minute ones on the fifth and seventh. Abdomen with two 

 setigerous punctures on each side of the terminal segment. 



This is the most robust species known as yet. It is considerably 

 larger than T. antarcticus, its nearest ally, and may be easily dis- 

 tinguished therefrom by the different elytral interstices, and by the 

 presence, on each elytron, of a large blister-like swelling extend- 

 ing across the fourth, fifth, and sixth interstices just behind the 

 posterior femur. 



? . Length, 16 ; breadth, 5f lines. 



Albury, Canterbury. Described from a female which Mr. W. W. 

 Smith, of Ashburton, kindly transmitted. 



Pterostichus. 



2435. P. arduus, n -s- Elongate, slightly convex ; glossy, 

 black, tarsi and antennae piceous, trophii pitchy-red, becoming paler 

 at the extremity. 



