396 COLEOPTERA. 
The nearest species is C. tuberculatus, but in it the punctation of the 
head and thorax is more distinct, that of the elytra is coarser and more 
irregular, near the sides particularly, there are no striae, and the posterior 
tubercles differ; its whole surface is more glossy, and the interantennal 
suture is obsolete near the sides. 
Length, 7$ mm.; breadth, 3} mm. 
Stewart Island. Unique. Found by Mr. W. Trail. 
3856. Cerodolus sulcisternus sp. nov. 
Convex, oblong - oval, moderately nitid, glabrous; aeneo - niger, legs, 
antennae, and palpi rufo-castaneous. 
Head narrower than thoracic apex, distinctly but not closely punctate. 
Thorax nearly twice as broad as long, finely margined, very gently curvedly 
narrowed anteriorly, almost straight and without any sinuation behind, 
the apex subtruncate, only very slightly emarginate, with obtuse but nearly 
rectangular angles; base widely bisinuate, its angles almost rectangular 
and accommodated within the excavation just inside the humeral margin ; 
its surface finely punctured, much more finely than the head, even more so 
and more distantly towards the sides and base, with a slight transverse 
impression between the middle and each side of the base. Scutellum trans- 
verse, nearly smooth. Elytra slightly wider than thorax at the base, thrice 
its length, gradually narrowed and a little uneven but not nodose behind 
the posterior femora, their margins most distinct near the base ; their whole 
surface irregularly and finely punctate, minutely wrinkled behind; each 
elytron with 7 series of distinct punctures, about 20 in each row, these 
become obsolete at the extremity, near the suture they almost form striae, 
near the lateral margin there is a series of fine punctures. 
Underside nigrescent, shining, abdomen finely and moderately closely 
punctured, prosternum nearly smooth, its process distinctly bisuleate but 
with its hind margin entire. 
Antennae almost as long as the head and thorax, 3rd joint evidently 
longer than 4th or 5th, 9th and 10th longer than broad but not quite as 
long as the 8th, the terminal elongate-oval. 
C. genialis (2059) is certainly the nearest species, but it is rather larger, 
the thorax is wider at the base, and is more distinctly and closely punctate, 
and the antennae are stouter. The prosternal process also is different, 
being more like that of C. aeneus (2060), in which, however, it is flatter 
and simply depressed throughout, whereas in C. sulcisternus it is almost 
elongate-oval, and the ridge between the grooves is on a lower plane than 
the margins. 
Length, 6mm.; breadth, 23 mm. 
Gordon’s Knob, near Nelson; 15th November, 1914. Four examples 
found by Mr. T. Hall. 
3857. Mesopatrum dubium sp. nov. Mesopatrum Broun, Man. N.Z. 
Coleopt., p. 1355. 
Oblong, nearly plane above, subopaque ; varying from fusco-testaceous 
to rufo-fuscous, tarsi and antennae of the latter hue, tibiae fusco-testaceous 
above, dark fuscous near the extremity ; with many minute pale setae. 
Head seemingly closely and coarsely punctate when examined from 
above but appearing granulate when viewed sideways, interantennal groove 
distinct. Thorax in the middle nearly twice as broad as long, base widely 
