MKLVUIDAK. 193 



SO at each side. Scutelluiii very short. Elytra thrice the length oi" 

 the thorax, evidently broader than it is at the base, very gradually and 

 slightl}- expanded posteriorly, broadly rounded at the extremity; their 

 punctiition very distinct and I'ather close, intrahumeral impressions 

 well marked. 



Legs elongate and slender; posterior tarsi as long as the tibiae; 

 basal joint of the anterior evidently shorter than the next, with a distinct 

 hook-like process at its inner extremity. 



Antennae longer than the liead and thorax, 2nd joint stout but much 

 shoi'ter than the basal, 'Jrd and 4th about equally elongate, joints 5-10 

 slightly longer and thicker, a little dilated towards the extremity but 

 not serrate, the terminal shorter. 



Length, 2§ mm. ; l)readth, J nun. 



Rakaia Gorge, near Methven. Two examples, found by Mr. T. Hall 

 on tlie 19th October and 1st November, 1912. 



3570. Arthracanthus fossicollis sp. nov. 



Elongate, shining; nigrescent, bronzed, legs and basal four joints of 

 the antennae fulvescent. 



Differs from A. fulv/pe.^ as follows : — 



Head and thorax shining, without minutely sculptured intervals 

 between the punctures. Thorax slightly longer than broad, its base un- 

 impressed in the middle, but with a large oblique fossa at each side of 

 it. Scutellum larger. Elytra concolorous, rather more coarsely punc- 

 tured, without impressions near the shoulders. The spiniform process 

 of the basal tarsal joint dii'ected downwards, and therefore less per- 

 ceptible from above. 



Length, 3 mm. ; breadth, 1 mm. 



Rakaia; 27th September, 1912. Unique. Also captured by Mr. T. 

 Hall. 



3571. Arthracanthus atriceps sp. nov. 



Elongate, subdepressed, glossy; head and thorax black, elytra some- 

 what cyaneous; antennae and legs piceous, the tarsi and extremity of 

 tibiae reddish-chestnut; sparingly clothed with inconspicuous, slender, 

 suberect, dark-ashy pubescence. 



Head, including the large prominent eyes, rather broader than the 

 thorax, finely and distantly punctate, the broad frontal impressions 

 convergent behind and more or less obviously prolonged as a broad 

 groove along the occiput. Thorax quite as long as broad, a little con- 

 stricted near the front, widest at or just behind the middle; rather more 

 distinctly punctured than the head, without definite posterior angles; 

 near the base there is a shallow median impression and another at each 

 side; these, however, are obsolete. Scutellum very short. Elytra fully 

 thrice the length of the thorax, broader than it is at the base, almost or 

 (juite straight-sided, with broadly, singly rounded apices ; they are 

 closely punctured, much more coarsely than the thorax, and there is a 

 distinct impression near each shoulder. 



Legs elongate and slender; tarsi as long as the tibiae, basal joint 

 of the anterior barely half the length of the 2nd, with a distinct curved 

 spiniform process at the inner extremity. 



Antennae longer than the head and thorax, their basal four joints 

 castaneous, in structure like those of A. fnlvipes. 



