^16 COLEOPTBRA. 



rugae near the base ; first segment ])artly covered by the femora, second 

 slightly longer than following ones, fifth shorter than fourth instead of 

 being longer, sixth short, distinctly but widely angulate at the middle of 

 the apex. 



Antennae short, structurally like those of 0. puncticollis. 



$. Length, 14 mm. ; breadth, 1^ mm. 



Stephen Island. Mr. A. C. O'Connor obtained several specimens on the 

 15th May, 1916, and on subsequent occasions, but no males were found. 



Eusoma White. Man. N.Z. Coleopt., p. 265. 

 4185. Eusoma piliventris sp. nov. 



Oblong, subdepressed, somewhat nitid, with some elongate, erect, 

 fulvescent setae on the head and along the sides of the thorax and elytra ; 

 fusco-testaceous, hinder half of head nigrescent, thorax with a large very 

 irregularly formed fuscous discal area, the elytra with series of irregular 

 ■dark spots, some of which are slightly violaceous. 



Head moderately finely and irregularly punctured "between the eyes, 

 smooth behind them ; clypeus distinctly, rather closely and rugosely 

 punctate, with reflexed margins, subtruncate in front. Thorax finely 

 marginate, nearly twice as broad as long, widely emarginate in front, its 

 acute angles clasping the basal part of the eyes ; base widely but slightly 

 bisinuate, with obtusely rectangular angles, the sides only slightly rounded, 

 nearly straight behind ; moderately and irregularly punctured. Scutellum 

 large, almost smooth, infuscate behind, rufescentat the base. Elytra 

 oblong, of same width as thorax at the base, thrice its length, their sub- 

 truncate apices usually covering the pygidivim ; they are moderately finely 

 subseriate-punctate ; on each elytron there are about six costae, half of 

 them rather less distinct than the others ; the suture nearly smooth in 

 front but with a series of fine punctures along the side, the interval between 

 it and the first costa is broader than the others, more coarsely and irregularly 

 punctured, and has larger dark marks. 



Anterior tibiae tridentate externally, the uppermost smallest ; tarsi 

 about double the length of the tibiae. 



Basal joint of antennae clavate at apex, nearly twice the length of the 

 thick second, third slender, shorter than first ; fourth fully as long as 

 preceding ones combined, attached to the apex of the third, so that the 

 portion which projects forwards and inwards is not more than a third of 

 its whole length ; club with four equally elongate, closely pubescent leaflets, 

 each obviously longer than the rest of the antennae. 



Underside nitid, testaceous, with numerous elongate fulvescent hairs. 



In the male of E. aenealls (2806), (Ann. Mag. Nat. Hist., ser. 8, vol. 3, 

 p. 397), the third antennal joint is almost as long as the fourth, which at 

 the inside of its base is united to the apex of the third, its basal ])ortion 

 forms an angle only, instead of a prolongation as in E. piliventris and 

 Sharp's Sericospilus advena (1987). The elytral scul])ture of this s])ecies 

 is distinctive. 



Length. 8 mm. : hrradth. 3i mm. 



Martinborough, near Wellington ; 10th August, 1916. Described from 

 a specimen found by Mr. A. C. O'Connor, who afterwards sent two other 

 specimens, one of which was lost ; the remaining one is a little more infuscate 

 above. 



