26 COLEOPTER A 



lateral groove begins as a broad depression, with the basal fovea, and 

 extends towards the front, gradually becoming narrower and fainter. 

 The elytra are nearly plane, smooth, and opaque, regularly elongate- 

 oval, with sharp lateral edges ; the interstices are quite flat, and the 

 three punctures of the third very well marked. The lahriim is broadly 

 and distinctly emarginated. The mesosternal epimera are short and 

 broad as in the sub-genus Platynm. 



55- A. (Platynus) COlensOniS, White: Voy. Ereh. Terr., Ins., p. 3. 

 Head with very slight grooves in front, very smooth behind ; antennce of 

 a brownish yellow, the first joint palest ; thorax in the middle with 

 three grooves, the outer curved ; head and thorax of a deep brown, the 

 latter ferruginous ; angle of thorax behind quite smooth ; elytra very 

 much depressed, with very distinct longitudinal stria;, third and fourth, 

 and fifth and sixth united at the end ; between the eighth and ninth is 

 a row of impressed points ; they are of a reddish brown ; the legs are of 

 a pale yellow. 



Length, 5I lines. 



New Zealand, — Colenso, Esq. 



56. A. (Platynus) edwardsii, Bates; Ann. Mag. Nat. Hist., 

 March- April, 1874.J P. clongatiis, modice convexus, niger nitidus, 

 palpis, antennis (articulis 1-3, exceptis) et tarsis rufo-piceis ; capite 

 ovato, pone oculos sub-constricto, supra Irevi ; thorace angusto, quadrato- 

 cordato, post medium fortiter sinuato, angulis posticis productis, acutis ; 

 elytris elongato-ovatis, apice fortiter sinuatis, convexis, profunde sub- 

 punctulato-striatis, interstitio tertio tripunctato. 



Long., 5-5I lin. M.F. 



Allied to P. colensonis, especially in the form of the thorax, with pro- 

 duced acute hind angles, but legs constantly pitchy black ; palpi and 

 antennae dull pitchy red, with the greater part of the three basal joints 

 of the latter black. The thorax, as in P. deplanatus and P. colensonis, 

 has a deep central groove, and on each side a curved, shallow, impressed 

 line proceeding from the basal fovea, and nearly reaching the anterior 

 angles. The lateral explanated margin is narrow and reflexed. All the 

 tarsi (except the dilated joints of the male) are sharply ridged and 

 grooved, as in P. deplanatus. 



57. A. (Platynus) Cheesemani, n.s. A large, elongate, shining 

 black insect. Head elongate, somewhat constricted and smooth behind, 

 rugosely impressed in i'ront, with long mandibles, and the third joint of the 

 maxillary palpi considerably longer than the last. Prothorax scarcely 

 longer than broad, though the eye is apt to be deceived in this respect, 

 it measures 26 x 2 lines, cordate-ovate, front angles obtuse, rounded 

 laterally, widest at the middle, and from thence sinuously narrowed to 

 the almost rectangular, but not acute, posterior angles ; the sides are 

 explanated and reflexed, the apex is slightly sinuate-emarginate, the base 

 subtruncate and obliciuely truncated close to the angles; tliere are the 

 usual median groove, and a curved impression near each side proceeding 



