FEliOMDAE. 149 



(iri)iip Fkronidae. 



3508. Trichosternus halli sp. iiov. Trichosternus Chaudoir, Man. N.Z. 

 Coleopt., p. 31. 



Oliloiiy, slightly convex, glossy; black, the elytra tinged with red 

 ;nid their sides distincth^ viridescent, the thorax along its sides and 

 i;oar the basal angles also greenish; legs piceous, the tarsi, antennae, 

 and palpi rufo-piceous, these last paler at the extremity. 



Head smooth, with well-developed frontal foveae; labrum emar- 

 ginate. Eyes prominent. Thorax a third broader than long, widest 

 before the middle, only moderately rounded there, gradually but hai-dly 

 at all sinuously narrowed towards the exactly rectangular posterior 

 angles, its base slightly and widely incurved, the apex more strongly; 

 mesial groove well marked, but not reaching tlie base or front, basal 

 fossae large and expanded towards the angles, the disc nearly smootli, 

 having only a few feebly impressed striae across it. Scutellum striate. 

 Elytra oblong, slightly sinuate near the apices, not thrice the length of 

 the thorax, a little broader than it is, with moderately dentifoiin 

 shoulders; their striae though distinct are not very deep, and finely 

 yet rather indistinctly punctate; the dorsal interstices are almost plane, 

 the 3rd are rather broader than adjacent ones and are irregularly 

 tripunctate, the 7th are sex-punctate. 



Legs normal, tiie middle tibiae somewhat compressed and pointed 

 at the extremity. 



Underside shining lilack, nearly quite smooth, the terminal ventral 

 segment cjuadripunctate at the apex. 



No described species is precisely similar. T. s'l/lrius, 72, as well as 

 71 and 73, also from Canterbury, differ in convexity, in depth of elytral 

 stria*^, and general appearance. 



o- Length, "20 mm.: breadtli, 6-i mm. 



Mount Hutt, near Methven. This bears the name of its discoverer, 

 Mr. T. Hall, who lias, under unfavourable conditions, found manv new 

 species there. 



3500. Pterostichus fossalis sp. nov. Pterostichus Bonelli, Man. N.Z. 

 Coleopt., p. 31. 



Elongate-oblong, slightly convex, shining; aeneo-uiger, antennae and 

 legs nigro-piceous, terminal joints of the former, the tarsi, and pal])i 

 more rufescent. 



Head, including the prominent eyes, as broad as front of thorax, 

 nearly smooth, with the common frontal impressions. Thorax nearly 

 a third broader than huig, apex moderately incurved, the base more 

 slightly so in the middle; its sides distinctly margined, moderately 

 rounded, rather wider before the middle than in front, a little sinuously 

 narrowed toAvards the rectangular but not j^rojecting posterior angles; 

 disc very feebly wrinkled, its sides smooth, mesial groove well marked 

 but not quite touching the apex, basal fossae large, each with a smaller 

 ininression on its outer slope and extending right to the base. Scutellum 

 striate. Elytra oblong-oval, at the base slightly wider than the thorax, 

 fully twice its lengtli, with dentiform humeral angles, they are somewhat 

 broader near the hind thighs than elsewhere, with slight subapical 

 sinuosities; their striae are well marked and very finely punctate, there 

 is no scutellar sti'iole ; the interstices are subequal, just perceptibly 

 convex, and quite impunctate; on each elytron, betAveon the Sth stria 



