Gentra and Species of Seio Zealand Coleoptera. 55 



leaflets in l)Otli sexes, and about as long as the preceding four 

 joints eonihiiK d. 



Lcnjjth 7.V, brcailtli 1— li lines. 



Ciouiwell. 



Diseril.'cd from three mutilated iiidividuds fomid by 

 Mr. J. II, Lewis on the saud-hilU of Molyneu.v River. 



Group Dynastidae. 

 Pericoptus frontalis, sp. n. 



Fusco-piceous, a little shining ; legs and antennae ferru- 

 ginous. 



Thorax stronj:ly transverse, anterior angles oblique and 

 very obtusely rounded for quite a third of the entire length, 

 its sides nearly straiglit ijehind, base bisiuuate ; the frontal 

 protuberanee is very small or obsolete, and the impression 

 just behind it is shallow; the fovea-like depression near each 

 side is more distinct. Elytra oblong, apices sul)truncate; 

 each bears a sutural stria, the punctuation is distinct but 

 irregular. 



linderside rather closely and finely sculptured, the punc- 

 tures on the abdomen are most distinct. Pyj^idium closely 

 and finely punctured. Sternal villosity very slenJer and 

 elongate, testaceous. 



Htad with rather shallow scanty punctuation behind; the 

 anterior margin of this part is rather abruptly dellcxcd, but 

 not at all ridged, and forms a sort of step to the lower plane 

 of the frontal portion ; this latter anterior part is somewhat 

 horizontal aiul has a transverse depression at its base, its 

 sides arii nearly straight for half its length, but are then 

 obliquely narrowed, the refl xcd and truncate apical margin, 

 howev. r, occupies about one-half of the whole width ; the 

 frontal seulptur.' coiisi>ts of moderate longitudinal iug;e near 

 the s'des, but the ..middle is nearly smooth ; there are no 

 di.stinct punctures there. 



Tiie hrad is, I thiidc, sufficiently diffcr.^ntiated from that of 

 the other species to render its recognition easy wh.Mi carefully 

 compared with typical specimens, but as many other stu;le:its 

 may not possess these types^ I now add brief notes for 

 reference. 



P. truncatus. — Head short, its frontal portion flattened, 

 but forming a rather abrupt declivity ; in shape it is, roughly, 

 truiisversidy oval. 



/-* pnnctatus. — Head, in front, on nearly the same |)lane 

 as ill t'. truncatus, but, instead of being transversely oviform, 



