Species of New-Zealand ^Coleopter a. 141 



Gyrinus Huttoni. 



G. obovatus, niger, nitidus ; prothorace longitudine quam latitudine 

 quadruple minore ; scutello elongato-triangulari ; elytris lineatim 

 punctulatis ; sutura senea ; pedibus antennisque rufo-testaceis. 

 Long. 2 lin. 



Hah. Waikato. ' 



Rather larger than our G. minutus^ the anterior half broader 

 than the posterior half, and the prothorax very considerably- 

 longer (the breadth is above six times the length in G. minutus) ; 

 and its scutellar lobe is very transverse. My specimen has a 

 slight iridescent hue. This and other species from Waikato 

 and Otago have been kindly sent to me by Captain Hutton. 



Potaminus^angusticollis. 



P. angusto-ovatus, sat dense griseo-hirtus ; antennis capite fere 

 duplo brevioribus ; prothorace latitudine paulo longiore, apicem 

 versus gradatim angustiore, basi bisinuata, lobo scutellari trun- 

 cate ; scutello triangular! ; elytris prothorace latioribus, convcxis, 

 sat fortiter striato-punctatis ; tibiis intermediis rectis, tarsis line- 

 aribus ; unguibus pallidis. Long. 1| lin. 



Hah. Waikato. 



Considerably narrower and more convex than P. suhstrtatus. 

 Probably not strictly congeneric. 



Trachyphloeus irritus. 



T. ovatus, indumento fuseo tectus ; rostro crasso, capite breviore • 

 scapovalido,setigero;funiculoclavaqueuitiderufo-ferrguineis,illiu3 

 articulo basali ampliato, secundo paulo breviore, caeteris transver- 

 sis ; prothorace fere in medio utrinque subangulato, supra modice 

 convexo, subtuberculato ; elytris subeordatis, prothorace paulo la- 

 tioribus, basi arcuatis, subpunctatis, interstitiis vix elevatis, squa- 

 mulis paucis pallidis adspersis ; pedibus rufo-fexTugiueis. Long 

 1^ lin. 



Hah. Tairua. 



Size and shape of T. porculus [ante, xviii. p. 59), but with a 

 remarkably stout scape, and the prothorax with the side a 

 little before the middle obtusely angled ; in T, porculus the 

 sides are rounded. 



NlC^ANA. 



Rostrum breve, crassiusculum, capiti continuatum ; scrohes fovei- 

 formes, apice rostri supra sitaj. OcuU rotundati. AntentKe va- 

 lidae ; scapus ad oculum postice attingens ; funiculus articulis 



