Mr. D. Sharp on the Elateridse of New Zealand. 405 



tern, mesosterni fovese lateribus crassis, fortiter elevatis, fere hori- 

 zontalibus. 



This species is a verj distinct one, not likely to be con- 

 founded with any other. The sexual disparity in the struc- 

 ture of the mesothoracic cavity is highly interesting, and is 

 such as in other cases is considered characteristic of distinct 

 genera ; in the female the tarsi also are stouter than in the 

 male and their lobes more distinct, the antennae also are less 

 elongate. 



A pair of this species has been sent me from Tairua by 

 Captain Broun as No. 190. 



9. Elater cinctiger^ White. 



E. ferrugineus, prothorace elytrisque versus latera vitta lata tes- 

 tacea ; parce brevissimeque pubeseens ; elytris ad apicem acutis, 

 evidenter sequaliterque striatis, striis fortiter punctatis, inter- 

 stitiis sparsim punctatis ; subfcus crebre punctatus, mesosterni 

 foveae lateribus baud elevatis, obliquis, nuUo modo borizontalibus. 



Mas angustulus, thorace elytris angustiore, angulis posterioribus 

 divergentibus, medio nitido. Long. 10-13 m.m., lat. fere 2\ m. m. 



Fern, latior, tborace elytris latiore, angulis posterioribus vix diver- 

 gentibus, medio fortiter punctate. Long. 13-14^ m. m., lat. 

 fere 3 m. m. 



The sexual discrepancies are here again very remarkable ; 

 the greatly developed thorax of the female gives it the aspect of 

 a minute Chalcolepidius. 



Sent from Auckland and Tairua by Messrs. Lawson and 

 Broun, but rare ; the female especially rare. The species is 

 probably confined to the Northern Island. 



Group 2. — The species nos. 6, 7, 8, and 9 exhibit the fol- 

 lowing structural characters : — 



Forehead curved in front, very distinctly separated from the 

 clypeus, which is slightly unfolded, but still subperpendicu- 

 lar ; antennal spaces more or less extended inwards, but their 

 boundaries ill defined, the labrura only attached at the sides to 

 the clypeus, so that in the middle there appears to be a kind 

 of space or gap over the labrum : the limits between the fore- 

 head and clypeus in the middle ill-defined. Joints 2 and 3 

 of antennae not much developed ; joints 4-10 not serrate; ap- 

 pendicular extremity of 11th joint short and but little marked. 

 Prosternal sutures duplicate. Mesosternal cavity and its 

 suture with the metasternum variable. Coxal plate of hind 

 coxa short, and gradually and slightly longer towards the 

 trochanter, so that there is no limit between the trochanteral 



Ann. cfc May. N. Hist. Ser. 4. Vol. xix. 28 



