Genera and Species of New Zealand Coleoptera. 451 



Group ERiRHiNiDiE. Group Lajiiid^. 



Xerostvgnus binodulug. Hybolasjus cognatu3. 



Stephanorhynchus pygraagus. 



gracilipos. 



• genalis. 



Group Cbyptocepiialid^. 



Group Ceramrycidje. 

 Drototelus politus. Eualema' Walker 



Group Cnemacanthidae. 

 Mecodema costellum, sp. n. 



Rohust; head and tliorax shining bhick^ eljtra rather dull, 

 legs and anteimas nigro-piceous. 



Head smooth on the middle, with longitudinal rugee in 

 front and near the eyes; behind these there are numerous 

 moderately small punctures. Mandibles unusually prominent. 

 Eyes moderately distant from thorax, rather small, their orbits 

 swollen. Antennce pubescent from the fifth joint onwards, 

 second joint as long as third. Thorax 4^ lines in width by 

 3f in length, widest near the front, rather gradually narrowed 

 backwards, but contracted to 2| lines at the base ; lateral 

 margins only feebly crenulate; disk with slightly impressed 

 transverse stria? ; these, however, become more distinct 

 towards the sides ; the dorsal longitudinal groove is well 

 marked, it does not attain the base or apex, but is almost 

 foveiform at the extremities ; the basal region bears short 

 longitudinal striag, and the fossaj are moderately large and 

 close to the sides; just before the middle there is a puncti- 

 form impression near each side. Elytra oblong-oval, nar- 

 rower at the shoulders than elsewhere ; each with three 

 slightly raised discoidal costte, the central one somewhat 

 abbreviated, the first and third united near the apex ; inter- 

 stices more or less rugosely but not coarsely punctated, the 

 sides with rather coarser sculpture. 



Underside almost smooth. 



S. Length 17, breadth 5^ lines. 



Described from a specimen forwarded by Captain F. W. 

 Hutton. 



Hah. Stephen's Island. 



sp. n. 



Elongate ; brilliant black, the antennae, tibipe, and tarsi 

 only slightly rufescent. 



Head longitudinally rugose near the eyes and in front, 

 vertex transversely rugose, the occiput with rugosely puncti- 

 form sculpture. Antennce reaching backwards to base of 



32* 



