Coleoptera from New Zealand. 307 



convex. Antennae filiform, attaining the middle thighs, their 

 second joint obviously shorter than the third. Thorax about 

 a third broader than long, widest before the middle, more, yet 

 only very gradually, narrowed behind than in front ; poste- 

 rior angles rounded, the anterior nearly rectangular ; lateral 

 margins rather fine, the apical and basal still finer ; the apex 

 widely, the base more deeply incurved ; its surface rather 

 flat, with some indistinct transverse rugae, the central channel 

 not abbreviated ; basal fossse represented by elongate impres- 

 sions extending about halfway towards the front, they are 

 hardly broader than the median groove ; there are two shallow 

 curvate impressions near each side in front. Elytra oblong- 

 oval, obliquely, but hardly at all sinuously, narrowed apically ; 

 their striae are sharply impressed but impunctate ; there is a 

 short scutellar stria on each, 3 to 7 are more or less irregu- 

 larly interrupted or confused behind ; interstices broad, not 

 convex, third bipunctate, sixth sometimes punctured. 



Underside piceous ; the head with a broad smooth line 

 along the middle, elsewhere finely wrinkled. 



This species may be distinguished from D. anthracina, its 

 nearest ally, by the silky opacity of the anterior half of the 

 body, the larger head, unusually thick mandibles, more basally 

 narrowed thorax, and by the peculiar colour of the elytra. 



$ . Length 4f , breadth If lines. 

 Ngatira, near the Rotorua railway. One female. 



Group Anchomenidse. 

 Ctenognathus actochares, sp. n. 



Black, shining ; the femora and the first and third antennal 

 joints more or less piceous ; the remaining joints of the latter, 

 as well as the tarsi and palpi, are rufous ; tibiae usually pitchy 

 red. 



Head oviform, the constriction behind the eyes continued 

 above as a more or less evident impression ; the middle is 

 convex. Thorax large, only about a sixth broader than long, 

 widest near the middle ; its sides rounded, with broad channels 

 and reflexed margins ; they are sinuate-angustate behind, but 

 there is a very short straight space near the posterior angles j 

 these are nearly rectangular, but generally obtuse ; the base 

 is truncate or almost so in the middle, but its sides are slightly 

 curved forwards ; the dorsal furrow is broad, and, as seen 

 from the sides, does not reach the base or apex ; the disk has 

 some obsolete undulating striae, and the depression or fossa 

 near each hind angle is more or less curvedly prolonged 



