298 COLEOPTERA 



530. C. elong^ata, Sharp ; Aiifi. Mag. Nat. Hist., May, 1877. 

 C. fusca, elongata, minus parallela, evidenter laxe fusco-pubescens ; 

 thorace paulo longiore quam latiore, crebre punctato ; elytris leviter 

 striatis striis punctatis, interstitiis crebre subtiliter punctatis, elongatis, 

 apicibus attenuatis et prolongatis, angulo externo magis prominulo, 

 minute spinoso ; p7'osterni lateribus crebre punctatis ; lamina coxali 

 interne evidenter latiore, margine posteriore supra trochanterem sat 

 evidenter emarginato ; antennis tarsisque gracilibus, elongatis. 



Long., 16 mm. 



This species comes very close to extreme forms of Chrosis barbata, 

 but is more elongate in form, and has the tarsi especially more elongate. 



Sent from Auckland by Mr. Lawson, and also received from Mr. 

 Edwards, but without number. 



Ochosternus. 



Candcze. 



This genus was formed for the reception of Thoramtts parryi and 

 White's Elater zealandicus: the first-named species belongs to Thoramus, 

 and I now retain the latter in this genus, accepting the definitions 

 given by Dr. Sharp in the Annals and Magazine of Natural History for 

 May, 1877, p. 25. 



Forehead curved in front, but without the least raised carina, in the 

 middle of the front depressed, so that the clypeus is very small ; and 

 though it is almost vertical, yet it forms only a very slight step between 

 the forehead and the labrum ; antenna/ spaces large, but yet rather 

 broadly separated. Antenna serrate, with short second joint. Prostcr- 

 nal process thick, slightly curved upwards. Mesosternal cavity with very 

 thick strongly elevated borders, the posterior portions of which are 

 horizontal and quite on a level with the metasternum ; the sides of the 

 cavity are not parallel, but quite narrow near the intercoxal suture. 

 Trochanteral portion of coxal plate a little broader than the femoral 

 portion. Tarsi with all the joints well developed and simple, the fourth 

 shorter than the tliird. This form is readily distinguished from the 

 species 1 have called Thoramus by the curved front edge of the 

 forehead and the large antennal spaces. 



531. O. zealandicus, White. Sharp ; Ann. Mag. Nat. Hist., 

 May, i^TJ- O. robi/stiis, niger, fusco-pubescens, sat nitidus ; antennis 

 minus elongatis, intus leviter serratis, articulo secundo brevissimo, tertio 

 sat elongato haud serrato ; protJwrace crassiusculo, antrorsum convexius- 

 culo, postice latiore, angulis posterioribus subuncatis, fortiter plicatim 

 elevatis, margine laterali anterius a supra occulto, crebre tequaliter punc- 

 tato ; elytris striatis, striis fortiter punctatis, interstitiis crebre subtiliter 

 punctatis, apicibus conjunctim rotundatis. 



Long., 16-20 mm. 



1 have examined a considerable number of examples, and find only 

 slight sexual differences in the structure. 



Auckland, Tairua, Wellington. According to Captain Broim's 

 observations the species is of crepuscular or nocturnal habits. 



