156 Transactions. 



Male. — Rostrum half length of thorax, broad, parallel, subdepressed 

 above, without any basal line of demarcation. Hcape medially inserted, 

 attaining back part of eye, straight, stout, gradually incrassate. Funiculus 

 5-articulate, 2nd joint longer than 3rd. the following 3 closely articulated 

 and subquadrate. Club ovate, not perceptibly annulate. 



Female. — Rostrum cylindric, parallel, rather longer and about half the 

 breadth of that of the male, its base on a rather lower level than the fore- 

 head. Antennae m.ore slender, inserted behind the middle. Thorax more 

 triangular, more gradually narrowed anteriorly. 



The above characters are derived from specimens in mv own collection. 



beet. 1. Rostrum of male longitudinally canaliculate. 



Pentarthrum zealandicum, WoUaston. 903. Trans. Ent. Soc, 1873.. 

 (Plate XV, fig. 1.) 



Subnitid, piceous, legs and elytra piceo-ferruginous or castancous, the 

 suture and sides of the latter piceous, tarsi and antennfo dark red ; very 

 indistinctly, minutely, and sparingly pubescent. 



Thorax widest near the base, posterior angles obliquely curvate, disc 

 moderately convex, but with a slight median basal impression, deeply con- 

 stricted near apex, distinctly and rather closely punctate. Elytra evidently 

 striate-punctate, interstices with fine serial punctures and transversely 

 rugose. 



Underside shining, piceous, scantily, minutely, and indistinctly pubescent, 

 finely but not closely punctured, base of prosternum somewhat transversely 

 rugose, metasternum medially sulcate behind, basal ventral segment broadly 

 impressed. 



Male. — Rostrum distinctly punctate, canaliculate along the middle, 

 the punctuation continued to the back of the eyes, occiput with a few fine 

 punctures. 



Female. — Rostrum slender, reddish, shining, finely and sparingly punc- 

 tured. 



This species varies in size and coloration. 



(? . Length, 2 lines ; breadth, quite i line. 



Both Islands. 



P. amicum, Broun. 2195. Man. N.Z. Coleopt., p. 1247. 



<S . Funiculus more slender than 903, eyes prominent behind, elytral 

 interstices not rugose, thorax rufescent. Sparingly clothed with slender 

 but quite perceptible yellow hairs. 



(? . Length, 1| lines ; breadth, | line. 



Paparoa, Howick. Unique. 



P. fultoni, Broun. 2189. Man. N.Z. Coleopt., p. 1243. 



J . Rostrum broad, gradually slightly narrowed anteriorly. Scape 

 short. Thorax shorter than 903, sides more strongly rounded. Castaneo- 

 rufous, head and apical portion of elytra piceous. 



S . Length, If lines ; breadth, f line. 



Taieri, Otago. One of each sex. 



P. proximum, Broun. 1627. Man. N.Z. Coleopt., p. 910. 



3 . Rostrum very closely punctate, very slightly, hardly appreciably, 

 wider at antennal insertion than elsewhere. Scape rather short. Uniformly 



