Broun. — Coleopterous Fauna of the Chatham hlands. 109 



The half-dozen alcoholic specimens were difficult to manipulate. In 

 trying to get out the rostrum and antennae the whole thorax would persist 

 in parting from the hind-body, &c. 



Length (rostrum exclusive), 3 mm. ; breadth, li ram. 



Pitt Island. 



Mr. Hall. 



Group Cossoxidae. 



Pentarthrum Wollaston. Man. N.Z. Coleopt., p, 508. 



93. Pentarthrum dissimilum sp. nov. 



Subglabrous, having only a few minute grey hairs near the apices of 

 the elytra, fusiform-cylindric, shining, rufous, elytra pale rufo-castaneous. 



Rostrum parallel, broad, half the length of thorax, longitudinally im- 

 pressed, distinctly but not closely punctate. Occiput smooth. Thorax of 

 almost equal length and breadth, widest and moderately rounded behind 

 the middle, gradually narrowed towards the abrupt but not deep frontal 

 stricture, it is moderately coarsely but not closely punctured. Scutelluni 

 small, yet distinct. Elytra slightly wider than thorax at the base, trun- 

 cate there, twice its length, narrowed near the extremity ; they are punc- 

 tate-striate, the punctures are well marked, the striae most distinctly 

 impressed behind the middle ; interstices with fine serial punctures, hardly 

 at all rugose, those nearest the suture somewhat thickened towards the 

 extremity. 



Scape medially inserted, straight, gradually thickened ; 2nd joint of 

 fmiiculus nearly the length of the 1st ; club rather narrow. 



Underside nitid, castaneo-rufous, sparingly and finely pubescent, dis- 

 tinctly but not very closely punctate, basal ventral segment broadly im- 

 pressed and not much longer than the 2nd. 



When compared with the male of P. zealandicum, 903, the eyes appear 

 less prominent, the rostrum more finely and less rugosely punctured, and 

 the elytra more distinctly striate, with more definite and not at all crenate 

 punctures. 



Male. — Length (rostrum inclusive), 4 mm. ; breadth, Cjuite 1 mm. 



Pitt Island. 



Mr. T. Hall. 



94. Pentarthrum auripilum sp. nov. 



Fusiform-cylindric, subnitid ; rufo-piceous, tarsi and antennae piceo- 

 rufous, club paler ; thinly covered with elongate golden hairs, which on 

 the thorax are disposed transversely. 



Rostrum quite half the length of thorax, not as broad as the head, 

 parallel, rather flat, broadly impressed along the middle ; rather closely, 

 coarsely, and somewhat rugosely punctured, more finely near the apex ; 

 pubescence distinct. Head similarly sculptured in front, the occiput nearly 

 smooth. Thorax slightly longer than broad, widest behind the middle, 

 rounded there, curvedly narrowed towards the abrupt apical constriction, 

 and with an evident gap between its widest part and each shoulder ; disc 

 moderately coarsely but not very closely punctured. Scutellum triangular, 

 rather small. Elytra subtruncate, and rather wider than thorax, at the 

 base, nearly twice its length, subcylindrical, narrowed behind the posterior 

 femora ; distinctly striate - punctate, interstices with well - marked serial 

 punctures and somewhat rugose. 



