OF NEW ZEALAND. 667 



prosternum broad and plane, emarginatc behind, incurved laterally. 

 JMcsostcrmim transversal, a little sinuated at the base, the suture appear- 

 ing crenulate. Anterior tibicd a little curved externally, with a few short 

 yellow spines or cilia?, the inner edge with fine hairs. 



The species is rather broad, yet less globular than A. brouni, and 

 wants the distinct punctation of that species. 



Two or three varieties occur ; some much more oviform and darker 

 in colour, almost black ; but I have not deemed it prudent to give them 

 distinct specific names. 



Length, f line ; breadth, \. 



I have several specimens, obtained chiefly in the neighbourhood of 

 Whangarei Harbour ; and, quite recently, I received another from Mr. P. 

 Stewart, of Wellington. 



Group-NITIDULIDJE (p. i68). 

 Cyclomorpha. 



N'ov. gen. 



Body very convex, nearly hemispherical, nude above. Mentum 

 large, truncated in the middle, semicircularly excised towards its 

 anterior angles. Terminal joint of the maxillary palpi gradually nar- 

 rowed and truncated at the extremity. Labrum transverse, obtusely 

 rounded and ciliated in front. Mandibles acute, with a pointed tooth 

 on their upper surface near the apex. Antcjinod inserted at the front 

 margin of the eyes, their basal joint robust, obtusely dilated inwardly. 

 Joints two to eight decrease in length ; second longest ; sixth decidedly 

 shorter than its predecessor, obconical; seventh and eighth similarly 

 formed, but shorter than sixth. Club well limited, tri-articulate, apical 

 joint rounded. Eyes large, longitudinally oviform, obsoletely facetted. 



Head large, abruptly contracted in line with the front part of the eyes, 

 which therefore appear conspicuous at that point. Prothorax strongly 

 transversal, narrowed anteriorly, finely marginated laterally, emarginated 

 behind each eye, base obliquely truncated towards the sides. IScutclhan 

 curvilincarly triangular. Elytra closely adapted to the thorax at the base, 

 finely margined, rounded, completely covering the hind-body. 



Legs slender ; tibioi a little expanded towards the extremity, the an- 

 terior most strongly, terminating in two short spurs ; tarsi pentamerous, 

 narrow, not dilated, finely hispid ; the fourth joint of the front pair about 

 as long as the third, emarginated at apex, but not at all bilobed ; fifth, 

 elongate ; claivs thickened at the base. 



Process of prosternum raised, not projecting. Mesostcrnum greatly 

 abbreviated. Aletastemum large, convex, and, like the whole of the 

 breast, sloping outwardly, so as to leave a distinct hollow between it and 

 the lower edge of the elytra. Abdomen composed of five free segments 

 decreasing in length, a little elevated along the middle, but on the same 

 plane at the sides as the narrow epipleuraj ; the intercoxal process broad 

 but acute at apex. Coxcb embedded, the two front pairs equally 

 separated and rather distant, the posterior less remote. Antennal 

 furroivs extending from front margin of the eyes backwards, oblique, 

 slightly convergent. 



