96 Traiis.actioit-<. 



Tibiae finely setose inwardly, with spiniforni setae externally, the inter- 

 mediate pair particularly ; the front pair incrassate. 



Male. — Tarsi with dense grey squamiform vestiture and elongate lateral 

 setae underneath ; basal joint of the anterior subtriangular, joints 2-4 

 strongly and equally dilated, about twice as broad as they are long, 2nd 

 and 3rd cordate, 4th entire below, deeply excavate in front, 5th nearlv 

 as long as the preceding two combined ; the intermediate pair of similar 

 structure, not quite as much expanded, their 5th joint equals the preceding 

 three in length ; the posterior with elongate-triangular articulations, 1st 

 and 2nd equal, 4th shorter than 3rd. 



Female. — Anterior tarsi not dilated, joints 2-4 somewhat cordiform ; 

 joints 1-3 of the middle pair triangular, 4th cordiform. 



Antennae sometimes testaceous and more or less maculate with browu, 

 they extend backwards to the base of the elytra, their 1st and 2nd joints 

 and the base of the 3rd are glabrous. 



The dilated joints of the intermediate tarsi of the male, and their vesti- 

 ture, in conjunction with the rounded posterior angles of the thorax, will 

 enable this species to be separated from its New Zealand congeners. 



Length, 8-9 mm. ; breadth, nearly 4 mm. 



Pitt Island. 



Found by Mr. T. Hall. 



Group Omalidae. 

 Omalium Gravenhorst. Man. N.Z. Coleopt., p. 115. 



54. Omalium robustum sp. nov. 



Robust, elongate, subdepressed : hind-body with distinct slender greyish 

 setae, thorax and elytra glabrous ; nigrescent, subopaque, the front of the 

 head and parts of thorax shining, legs and antennae variable, generally pale 

 castaneous, the terminal half of these latter darker. 



Head evidently smaller than thorax, longitudinally bi-impressed, nearly 

 smooth and shining along the middle, but dull with dense minute sculpture 

 behind, its punctation fine and irregular ; the ocelli situated in small 

 foveae in line with the back part of the eyes, these are large and mode- 

 rately prominent. Thorax rather broader than long, its sides finely mar- 

 gined, nearly straight, just a little curvedly narrowed in front, apex sub- 

 trmicate, with obtuse angles, the base straight, with almost rectangular 

 angles ; disc with a pair of large impressions which are somewhat expanded 

 behind, their outer borders and the narrow space between them shining 

 but not perfectly smooth ; nearly all the rest of the surface is rendered 

 dull by the dense minute sculpture ; the pmictures are irregularly distri- 

 buted, distant on the glossy parts and apparently nearly absent at the 

 sides. Scutellum triangular. Elytra oblong, double the length of thorax ; 

 shoulders slightly prominent and clasping the thoracic angles ; apices 

 truncate, but oblique near the sides ; with fine subseriate punctures visible 

 along the dull dense sculpture of the surface. Hind -body gradually 

 narrowed posteriorly, closely and finely punctured, the basal 3 segments 

 about equal and broadly marginated, 4th slightly longer. 5th subconical, 

 the basal with a pair of rotundate pale specks. 



Antennae as long as the head and thorax ; their basal johit long and 

 stout ; 2nd short ; 3rd elongate, nearly as long as the 4th and 5th combined ; 

 joints 6-11 loosely articulated, finely pubescent, broader than the preceding 



