OF NEW ZEALAND. 991 



of this list, and, moreover, one group, the first, is made up of species 

 belonging to two subgenera. 



As regards the setae, I may state that careful discrimination is 

 necessary, as is the case with the subgenus TrichosterJius, owing to 

 their liability of removal in the process of cleaning. 



Thorax ivitJi two sctcc on each side. 



P. prolixus, Broun. P. mordax, Broun. 



P. integratus, Bates. P. longiformis, Sharp. 



P. cavelli, Broun. P. sternalis, Broun. 



P. procerulus, Brown. P. oscillator, SJiarp. 



P. ovatellus, CJiaudoir. P. perfidiosus, Broun. 



P. placidulus, Broun. P. hunuensis, 



P. impiger, „ P. maorinus, Bates. 

 P. minor 



TJiorax with three seta on each side. 

 P. clongcUus, White. 



Thorax with four setce on each side. 



P. hispidulus, Broun. P. detractu.s, Broun. 



P. cribralis, „ P. suba'ueus, Gucrin. 



P. myrmidou, Sharp. P. cedicnemus. Bates. 



P. hybridus, Broun. P. pastoricius, Broun. 



P. pnecox, „ P. inconstans, 



P. brounianus, Sliarp. P. egmontensis, 



P. constrictellus, „ P. irregularis, 



Doubtful. 

 P. angustulus, Chaudoir. P. politissima. White. 



P. sylvaticus, „ P. pellax, Broun. 



P. vigil. White. 



TJiorax with five or six sctcc on each side. 

 P. catenulatus, Broun. P. insidiosus, Broun. 



P. mucronatus, 



Pterostichus. 



1780. P. cavelli, "••^'- Elongate, slightly convex ; black, occa- 

 sionally tinged with red ; palpi pitchy-red. 



Thorax widest near the middle, as broad as long, much narrowed 

 behind, and distinctly sinuate before the acute, rectangular posterior 

 angles ; apex emarginate ; basal fosste large and elongate, medial 

 groove sometimes abbreviated, the disc faintly transversely striate. 

 Scutelhun striate at base. Elytra elongate, curved laterally, apices 

 rounded ; their strise well developed and finely punctured. Two 

 lateral thoracic setce. 



Although P. helinsi is very similar, according to description, this 

 species difi'ers therefrom in having the elytral grooves distinctly yet 

 finely punctated ; the elytra are not at all acuminate, being, in fact, 

 rather broad behind ; the interstices have feeble impressions across 

 them. 



Length, 9i- ; breadth, 3 lines. 



Boatman's, near Eeefton. It affords me pleasure to attach the 

 name of its discoverer (Mr. A. T. Cavell) to this species. 



1781. P, longiformis, ""S. {Sharp ; Trans. Boy. Dub. Soc, 

 1886, p. 369. j Minor, angustulus subparallelus nigro-piceus, 



2 — PT. v. 



