674 COLEOPTERA. 



4262. Mecodema subaeneum sp. nov. 



Elongate, slightly convex, shining aeneo-niger ; palpi, antennae, and 

 tarsi piceous. 



Head narrower than thorax, constricted and evidently punctate behind 

 the prominent eyes, the forehead distinctly longitudinally striate, some- 

 what rugose near the eyes, labrum subtruncate in front ; mandibles 

 moderately wrinkled. Thorax only slightly broader than long, rather 

 more emarginate at the base than the apex, its sides finely margined, not 

 distinctly crenulate, only slightly wider before the middle than else- 

 where, moderately contracted near the obtuse basal angles ; disc nearly 

 smooth in front, only slightly transversely striate behind, longitudinally 

 at the base ; dorsal furrow well marked but obsolete at the a])ex, basal 

 fossae narrow and placed close to the sides. Elytra oblong-oval, a third 

 longer but only slightly broader than thorax, with distinct margins ; 

 irregularly seriate-punctate, the inner series rather finer than those 

 towards the sides. 



Underside nitid, mesosternum and flanks of prosternum distinctly 

 punctate, terminal ventral segment bipunctate near each side of the apex. 



Basal four joints of antennae almost glabrous, all the palpi truncate 

 at the extremity. Mentum finely bidentate in front. Basal three joints 

 of anterior tarsi moderately prominent externally, posterior tibiae not 

 expanded at the extremity. 



Most nearly resembles M. aeneoniger from Mount Maungatua, but in 

 1453 the palpi are more slender, the foveae of thorax are broader and 

 evidently punctate, the elytra are much more finely and distantly sculp- 

 tured, the outer angles of the intermediate tibiae are more prominent, 

 and the whole surface is more glossy. 



c?. Length, 19 mm.; breadth, 5| mm. 



Martinborough. A single specimen from Mr. A. C. O'Connor. 



Group Feronidae. 

 Pterostichus Bonelli. Man. N.Z. Coleopt., p. 31. 

 4263. Pterostichus truncatulus sp. nov. 



Elongate, slightly convex, nitid ; black, elytra faintly rufescent, palpi 

 and tarsi piceous. 



Head narrower than thorax, smooth, frontal impressions well marked ; 

 labrum widely emarginate. Eyes proniinent. Thorax only slightly broader 

 than long, widest before the middle, its sides distinctly and equally mar- 

 ginate, gradually curvedly narrowed and feebly sinuate towards the rect- 

 angular posterior angles, base less widely incurved than the apex ; surface 

 almost smooth, central groove nearly attaining the front and base ; basal 

 fossae deep, rather elongate, situated nearer the sides than the middle and 

 not reaching the hind margin. Elytra elongate-oval, nearly a third broader 

 than thorax, almost thrice its length, the shoulders dentiform and slightly 

 broader than the tlioracic base, apices broadly truncate ; each elytron 

 with seven definite, apparently im])unctate striae ; interstices nearly i)lane, 

 the third inner not quite as wide as the others, the lateral punctiform 

 sculpture irregular. 



This belongs to the section having the sides of the thorax bisetose. The 

 scutellum is only obsoletely striate. The terminal ventral segment is 

 bipunctate at each side of the middle at the apex. The somewhat externally 



